diff --git a/README.md b/README.md
new file mode 100644
index 0000000..deb23a8
--- /dev/null
+++ b/README.md
@@ -0,0 +1,3 @@
+ # Playground
+
+A repository to play around in
diff --git a/React/DoItJust/src/App.tsx b/React/DoItJust/src/App.tsx
index 0d19ca3..5a54b8c 100644
--- a/React/DoItJust/src/App.tsx
+++ b/React/DoItJust/src/App.tsx
@@ -1,8 +1,10 @@
-import {useAppSelector} from './store';
-import {TodoItem} from './entities/TodoItem';
+import {selectTodoItems} from "./store/slices";
 import {TodoItemComponent} from './components/TodoItem/TodoItem';
+import { useAppSelector } from "./store";
+
 export default function App() {
-  const items = useAppSelector(state => state.todo.items);
+  const items = useAppSelector(selectTodoItems);
+  
 
   return (
     <div style={{width: '100vw', height: '100vh'}}>
diff --git a/React/DoItJust/src/components/TodoItem/TodoItem.tsx b/React/DoItJust/src/components/TodoItem/TodoItem.tsx
index 8735f90..7791a75 100644
--- a/React/DoItJust/src/components/TodoItem/TodoItem.tsx
+++ b/React/DoItJust/src/components/TodoItem/TodoItem.tsx
@@ -6,7 +6,14 @@ export interface ITodoItemProps {
 }
 
 export const TodoItemComponent = ({todo: {id, title, notes, createdAt, updatedAt, dueAt, isArchived, isDone}}: ITodoItemProps): JSX.Element => {
-  return <div key={id} style={{border: '2px solid black', display: 'flex', width: '800px', height: '400px', flexDirection: 'column', margin: 'auto'}}>
+  return <div key={id} style={{
+    border: '2px solid black', 
+    display: 'flex', 
+    width: '800px', 
+    height: '250px', 
+    flexDirection: 'column', 
+    margin: 'auto'
+  }}>
     <header >{title}</header>
     <div>
       <textarea defaultValue={notes ?? ''}></textarea>
diff --git a/React/DoItJust/src/store/slices/TodoSlice.ts b/React/DoItJust/src/store/slices/TodoSlice.ts
index 37e8272..c040a07 100644
--- a/React/DoItJust/src/store/slices/TodoSlice.ts
+++ b/React/DoItJust/src/store/slices/TodoSlice.ts
@@ -1,5 +1,5 @@
 import type {Nullable} from '../../types/definedTypes';
-import {createSlice} from '@reduxjs/toolkit';
+import {createSelector, createSlice} from '@reduxjs/toolkit';
 import {TodoItem} from '../../entities/TodoItem';
 
 interface ITodoSliceState {
@@ -20,6 +20,7 @@ const initialTodoState: ITodoSliceState = {
   error: null
 };
 
+
 export const TodoSlice = createSlice({
   name: 'todo',
   initialState: initialTodoState,
@@ -61,5 +62,8 @@ export const TodoSlice = createSlice({
   //}
 });
 
+
+const selectTodos = (state: {todo: ITodoSliceState}) => state.todo;
+export const selectTodoItems = createSelector([selectTodos], todo => todo.items);
 export const {appendTodoItem} = TodoSlice.actions;
 export const todoSliceStateReducer = TodoSlice.reducer;
diff --git a/RequireJs/require-js-node/.cursor/rules/use-bun-instead-of-node-vite-npm-pnpm.mdc b/RequireJs/require-js-node/.cursor/rules/use-bun-instead-of-node-vite-npm-pnpm.mdc
new file mode 120000
index 0000000..6100270
--- /dev/null
+++ b/RequireJs/require-js-node/.cursor/rules/use-bun-instead-of-node-vite-npm-pnpm.mdc
@@ -0,0 +1 @@
+../../CLAUDE.md
\ No newline at end of file
diff --git a/RequireJs/require-js-node/.gitignore b/RequireJs/require-js-node/.gitignore
new file mode 100644
index 0000000..a14702c
--- /dev/null
+++ b/RequireJs/require-js-node/.gitignore
@@ -0,0 +1,34 @@
+# dependencies (bun install)
+node_modules
+
+# output
+out
+dist
+*.tgz
+
+# code coverage
+coverage
+*.lcov
+
+# logs
+logs
+_.log
+report.[0-9]_.[0-9]_.[0-9]_.[0-9]_.json
+
+# dotenv environment variable files
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# caches
+.eslintcache
+.cache
+*.tsbuildinfo
+
+# IntelliJ based IDEs
+.idea
+
+# Finder (MacOS) folder config
+.DS_Store
diff --git a/Web/WebSocket/websocket/frontend/.npmrc b/RequireJs/require-js-node/.npmrc
similarity index 100%
rename from Web/WebSocket/websocket/frontend/.npmrc
rename to RequireJs/require-js-node/.npmrc
diff --git a/Web/WebSocket/websocket/server/.prettierrc b/RequireJs/require-js-node/.prettierrc
similarity index 100%
rename from Web/WebSocket/websocket/server/.prettierrc
rename to RequireJs/require-js-node/.prettierrc
diff --git a/RequireJs/require-js-node/CLAUDE.md b/RequireJs/require-js-node/CLAUDE.md
new file mode 100644
index 0000000..b8100b7
--- /dev/null
+++ b/RequireJs/require-js-node/CLAUDE.md
@@ -0,0 +1,111 @@
+---
+description: Use Bun instead of Node.js, npm, pnpm, or vite.
+globs: "*.ts, *.tsx, *.html, *.css, *.js, *.jsx, package.json"
+alwaysApply: false
+---
+
+Default to using Bun instead of Node.js.
+
+- Use `bun <file>` instead of `node <file>` or `ts-node <file>`
+- Use `bun test` instead of `jest` or `vitest`
+- Use `bun build <file.html|file.ts|file.css>` instead of `webpack` or `esbuild`
+- Use `bun install` instead of `npm install` or `yarn install` or `pnpm install`
+- Use `bun run <script>` instead of `npm run <script>` or `yarn run <script>` or `pnpm run <script>`
+- Bun automatically loads .env, so don't use dotenv.
+
+## APIs
+
+- `Bun.serve()` supports WebSockets, HTTPS, and routes. Don't use `express`.
+- `bun:sqlite` for SQLite. Don't use `better-sqlite3`.
+- `Bun.redis` for Redis. Don't use `ioredis`.
+- `Bun.sql` for Postgres. Don't use `pg` or `postgres.js`.
+- `WebSocket` is built-in. Don't use `ws`.
+- Prefer `Bun.file` over `node:fs`'s readFile/writeFile
+- Bun.$`ls` instead of execa.
+
+## Testing
+
+Use `bun test` to run tests.
+
+```ts#index.test.ts
+import { test, expect } from "bun:test";
+
+test("hello world", () => {
+  expect(1).toBe(1);
+});
+```
+
+## Frontend
+
+Use HTML imports with `Bun.serve()`. Don't use `vite`. HTML imports fully support React, CSS, Tailwind.
+
+Server:
+
+```ts#index.ts
+import index from "./index.html"
+
+Bun.serve({
+  routes: {
+    "/": index,
+    "/api/users/:id": {
+      GET: (req) => {
+        return new Response(JSON.stringify({ id: req.params.id }));
+      },
+    },
+  },
+  // optional websocket support
+  websocket: {
+    open: (ws) => {
+      ws.send("Hello, world!");
+    },
+    message: (ws, message) => {
+      ws.send(message);
+    },
+    close: (ws) => {
+      // handle close
+    }
+  },
+  development: {
+    hmr: true,
+    console: true,
+  }
+})
+```
+
+HTML files can import .tsx, .jsx or .js files directly and Bun's bundler will transpile & bundle automatically. `<link>` tags can point to stylesheets and Bun's CSS bundler will bundle.
+
+```html#index.html
+<html>
+  <body>
+    <h1>Hello, world!</h1>
+    <script type="module" src="./frontend.tsx"></script>
+  </body>
+</html>
+```
+
+With the following `frontend.tsx`:
+
+```tsx#frontend.tsx
+import React from "react";
+
+// import .css files directly and it works
+import './index.css';
+
+import { createRoot } from "react-dom/client";
+
+const root = createRoot(document.body);
+
+export default function Frontend() {
+  return <h1>Hello, world!</h1>;
+}
+
+root.render(<Frontend />);
+```
+
+Then, run index.ts
+
+```sh
+bun --hot ./index.ts
+```
+
+For more information, read the Bun API docs in `node_modules/bun-types/docs/**.md`.
diff --git a/RequireJs/require-js-node/README.md b/RequireJs/require-js-node/README.md
new file mode 100644
index 0000000..1404cbf
--- /dev/null
+++ b/RequireJs/require-js-node/README.md
@@ -0,0 +1,15 @@
+# require-js-node
+
+To install dependencies:
+
+```bash
+bun install
+```
+
+To run:
+
+```bash
+bun run src/index.ts
+```
+
+This project was created using `bun init` in bun v1.2.21. [Bun](https://bun.com) is a fast all-in-one JavaScript runtime.
diff --git a/RequireJs/require-js-node/bun.lock b/RequireJs/require-js-node/bun.lock
new file mode 100644
index 0000000..2cbc9f4
--- /dev/null
+++ b/RequireJs/require-js-node/bun.lock
@@ -0,0 +1,37 @@
+{
+  "lockfileVersion": 1,
+  "workspaces": {
+    "": {
+      "name": "require-js-node",
+      "dependencies": {
+        "requirejs": "2.3.7",
+      },
+      "devDependencies": {
+        "@types/bun": "latest",
+        "@types/requirejs": "2.1.37",
+      },
+      "peerDependencies": {
+        "typescript": "^5",
+      },
+    },
+  },
+  "packages": {
+    "@types/bun": ["@types/bun@1.2.21", "", { "dependencies": { "bun-types": "1.2.21" } }, "sha512-NiDnvEqmbfQ6dmZ3EeUO577s4P5bf4HCTXtI6trMc6f6RzirY5IrF3aIookuSpyslFzrnvv2lmEWv5HyC1X79A=="],
+
+    "@types/node": ["@types/node@24.3.1", "", { "dependencies": { "undici-types": "~7.10.0" } }, "sha512-3vXmQDXy+woz+gnrTvuvNrPzekOi+Ds0ReMxw0LzBiK3a+1k0kQn9f2NWk+lgD4rJehFUmYy2gMhJ2ZI+7YP9g=="],
+
+    "@types/react": ["@types/react@19.1.12", "", { "dependencies": { "csstype": "^3.0.2" } }, "sha512-cMoR+FoAf/Jyq6+Df2/Z41jISvGZZ2eTlnsaJRptmZ76Caldwy1odD4xTr/gNV9VLj0AWgg/nmkevIyUfIIq5w=="],
+
+    "@types/requirejs": ["@types/requirejs@2.1.37", "", {}, "sha512-jmFgr3mwN2NSmtRP6IpZ2nfRS7ufSXuDYQ6YyPFArN8x5dARQcD/DXzT0J6NYbvquVT4pg9K9HWdi6e6DZR9iQ=="],
+
+    "bun-types": ["bun-types@1.2.21", "", { "dependencies": { "@types/node": "*" }, "peerDependencies": { "@types/react": "^19" } }, "sha512-sa2Tj77Ijc/NTLS0/Odjq/qngmEPZfbfnOERi0KRUYhT9R8M4VBioWVmMWE5GrYbKMc+5lVybXygLdibHaqVqw=="],
+
+    "csstype": ["csstype@3.1.3", "", {}, "sha512-M1uQkMl8rQK/szD0LNhtqxIPLpimGm8sOBwU7lLnCpSbTyY3yeU1Vc7l4KT5zT4s/yOxHH5O7tIuuLOCnLADRw=="],
+
+    "requirejs": ["requirejs@2.3.7", "", { "bin": { "r.js": "bin/r.js", "r_js": "bin/r.js" } }, "sha512-DouTG8T1WanGok6Qjg2SXuCMzszOo0eHeH9hDZ5Y4x8Je+9JB38HdTLT4/VA8OaUhBa0JPVHJ0pyBkM1z+pDsw=="],
+
+    "typescript": ["typescript@5.9.2", "", { "bin": { "tsc": "bin/tsc", "tsserver": "bin/tsserver" } }, "sha512-CWBzXQrc/qOkhidw1OzBTQuYRbfyxDXJMVJ1XNwUHGROVmuaeiEm3OslpZ1RV96d7SKKjZKrSJu3+t/xlw3R9A=="],
+
+    "undici-types": ["undici-types@7.10.0", "", {}, "sha512-t5Fy/nfn+14LuOc2KNYg75vZqClpAiqscVvMygNnlsHBFpSXdJaYtXMcdNLpl/Qvc3P2cB3s6lOV51nqsFq4ag=="],
+  }
+}
diff --git a/RequireJs/require-js-node/package.json b/RequireJs/require-js-node/package.json
new file mode 100644
index 0000000..06dac0e
--- /dev/null
+++ b/RequireJs/require-js-node/package.json
@@ -0,0 +1,16 @@
+{
+  "name": "require-js-node",
+  "module": "src/index.ts",
+  "type": "module",
+  "private": true,
+  "devDependencies": {
+    "@types/bun": "latest",
+    "@types/requirejs": "2.1.37"
+  },
+  "peerDependencies": {
+    "typescript": "^5"
+  },
+  "dependencies": {
+    "requirejs": "2.3.7"
+  }
+}
diff --git a/RequireJs/require-js-node/src/index.ts b/RequireJs/require-js-node/src/index.ts
new file mode 100644
index 0000000..7bd03a5
--- /dev/null
+++ b/RequireJs/require-js-node/src/index.ts
@@ -0,0 +1,7 @@
+// requireJs
+
+import {requirejs} from 'requirejs';
+
+requirejs.config({
+
+})
diff --git a/RequireJs/require-js-node/tsconfig.json b/RequireJs/require-js-node/tsconfig.json
new file mode 100644
index 0000000..81b477a
--- /dev/null
+++ b/RequireJs/require-js-node/tsconfig.json
@@ -0,0 +1,31 @@
+{
+  "compilerOptions": {
+    // Environment setup & latest features
+    "lib": ["ESNext"],
+    "target": "es6", 
+    "module": "AMD",
+    "moduleDetection": "force",
+    "jsx": "react-jsx",
+    "allowJs": true,
+
+    // Bundler mode
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "noEmit": true,
+
+    // Best practices
+    "strict": true,
+    "skipLibCheck": true,
+    "noFallthroughCasesInSwitch": true,
+    "noUncheckedIndexedAccess": true,
+    "noImplicitOverride": true,
+
+    // Some stricter flags (disabled by default)
+    "noUnusedLocals": false,
+    "noUnusedParameters": false,
+    "noPropertyAccessFromIndexSignature": false
+  },
+  "include": ["src"],
+  "exclude": [],
+}
diff --git a/Web/WebSocket/package.json b/Web/WebSocket/package.json
new file mode 100644
index 0000000..5cd2d7a
--- /dev/null
+++ b/Web/WebSocket/package.json
@@ -0,0 +1,5 @@
+{
+    "name": "@techniker-me/websocket-chat",
+    "version": "0.0.0",
+    "workspaces": ["server", "frontend"]
+}
diff --git a/Web/WebSocket/websocket/server/.npmrc b/Web/WebSocket/websocket/.npmrc
similarity index 100%
rename from Web/WebSocket/websocket/server/.npmrc
rename to Web/WebSocket/websocket/.npmrc
diff --git a/Web/WebSocket/websocket/server/.nvmrc b/Web/WebSocket/websocket/.nvmrc
similarity index 100%
rename from Web/WebSocket/websocket/server/.nvmrc
rename to Web/WebSocket/websocket/.nvmrc
diff --git a/Web/WebSocket/websocket/.prettierrc b/Web/WebSocket/websocket/.prettierrc
new file mode 100644
index 0000000..caa814d
--- /dev/null
+++ b/Web/WebSocket/websocket/.prettierrc
@@ -0,0 +1,12 @@
+{
+  "arrowParens": "avoid",
+  "bracketSameLine": true,
+  "bracketSpacing": false,
+  "printWidth": 160,
+  "semi": true,
+  "singleAttributePerLine": false,
+  "singleQuote": true,
+  "tabWidth": 2,
+  "trailingComma": "none",
+  "useTabs": false
+}
diff --git a/Web/WebSocket/websocket/README.md b/Web/WebSocket/websocket/README.md
new file mode 100644
index 0000000..dee02dd
--- /dev/null
+++ b/Web/WebSocket/websocket/README.md
@@ -0,0 +1,60 @@
+# WebSocket Chat Monorepo
+
+A real-time WebSocket chat application built with TypeScript, Express, and Vite.
+
+## Project Structure
+
+```
+├── apps/
+│   ├── server/          # Express WebSocket server
+│   └── frontend/        # React/Vite frontend
+├── packages/
+│   └── shared-types/    # Shared TypeScript types
+└── package.json         # Root workspace configuration
+```
+
+## Quick Start
+
+```bash
+# Install all dependencies
+npm install
+
+# Start both server and frontend in development mode
+npm start
+
+# Or run individually:
+npm run dev:server    # Start server only
+npm run dev:frontend  # Start frontend only
+```
+
+## Available Scripts
+
+- `npm start` - Build shared types and start both server and frontend
+- `npm run dev:all` - Start both server and frontend concurrently
+- `npm run dev:server` - Start server only
+- `npm run dev:frontend` - Start frontend only
+- `npm run build` - Build all packages
+- `npm run typecheck` - Type check all packages
+- `npm run lint` - Lint all packages
+- `npm run clean` - Clean all build outputs
+
+## Development
+
+The monorepo uses npm workspaces for dependency management and TypeScript project references for type checking across packages.
+
+### Server
+- Runs on `http://localhost:3000`
+- WebSocket endpoint: `ws://localhost:3000/ws`
+- Health check: `http://localhost:3000/ping`
+
+### Frontend
+- Runs on `http://localhost:5173` (Vite default)
+- Connects to WebSocket server for real-time messaging
+
+## Features
+
+- Real-time WebSocket communication
+- Ping/pong latency measurement
+- Shared TypeScript types across packages
+- Hot reload for development
+- Monorepo workspace management
diff --git a/Web/WebSocket/websocket/frontend/bun.lock b/Web/WebSocket/websocket/apps/frontend/bun.lock
similarity index 100%
rename from Web/WebSocket/websocket/frontend/bun.lock
rename to Web/WebSocket/websocket/apps/frontend/bun.lock
diff --git a/Web/WebSocket/websocket/frontend/index.html b/Web/WebSocket/websocket/apps/frontend/index.html
similarity index 100%
rename from Web/WebSocket/websocket/frontend/index.html
rename to Web/WebSocket/websocket/apps/frontend/index.html
diff --git a/Web/WebSocket/websocket/frontend/package-lock.json b/Web/WebSocket/websocket/apps/frontend/package-lock.json
similarity index 100%
rename from Web/WebSocket/websocket/frontend/package-lock.json
rename to Web/WebSocket/websocket/apps/frontend/package-lock.json
diff --git a/Web/WebSocket/websocket/apps/frontend/package.json b/Web/WebSocket/websocket/apps/frontend/package.json
new file mode 100644
index 0000000..c46a731
--- /dev/null
+++ b/Web/WebSocket/websocket/apps/frontend/package.json
@@ -0,0 +1,22 @@
+{
+  "name": "@techniker-me/websocket-frontend",
+  "private": true,
+  "version": "0.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc && vite build",
+    "preview": "vite preview",
+    "typecheck": "tsc",
+    "clean": "rm -rf dist",
+    "lint": "echo 'No linting configured for frontend'"
+  },
+  "devDependencies": {
+    "typescript": "5.9.2",
+    "vite": "7.1.7"
+  },
+  "dependencies": {
+    "@techniker-me/logger": "0.0.15",
+    "@techniker-me/tools": "2025.0.16"
+  }
+}
diff --git a/Web/WebSocket/websocket/frontend/src/main.ts b/Web/WebSocket/websocket/apps/frontend/src/main.ts
similarity index 96%
rename from Web/WebSocket/websocket/frontend/src/main.ts
rename to Web/WebSocket/websocket/apps/frontend/src/main.ts
index ba52720..77e3cbe 100644
--- a/Web/WebSocket/websocket/frontend/src/main.ts
+++ b/Web/WebSocket/websocket/apps/frontend/src/main.ts
@@ -25,6 +25,11 @@ messagesElement.id = 'messages-container';
 const messageInput = document.createElement('input');
 messageInput.type = 'text';
 messageInput.disabled = true;
+messageInput.onkeydown = ({target}) => {
+  if (target.value === 'enter') {
+    sendMessage()
+  }
+};
 
 const actionButton = document.createElement('button');
 actionButton.innerText = 'Set your username!';
@@ -32,8 +37,8 @@ actionButton.innerText = 'Set your username!';
 disposables.add(websocket.on('message', (message: any) => {
   if (message.pong) {
     console.log('[WebSocket] Received message', message);
-    // Use server-calculated RTT
     const rtt = message.pong.rtt || 0;
+
     rttContainer.innerHTML = `RTT: [<span id="rtt-value">${rtt.toFixed(2)}</span>] ms`;
   } else {
     messagesElement.innerHTML += `<div class="message"> [${new Date(message.sentAt).toLocaleString("en-US", {timeStyle: 'short'})}]${message.message.author}: ${message.message.payload}</div>`;
@@ -50,9 +55,11 @@ chatContainer.append(actionButton);
 appContainer.append(chatContainer);
 actionButton.onclick = () => {
   const usernamePrompt = prompt('Enter your name:');
+
   if (!usernamePrompt) {
     return;
   }
+
   username = usernamePrompt;
   messageInput.disabled = false;
   messageInput.placeholder = 'Enter a message...';
@@ -62,6 +69,7 @@ actionButton.onclick = () => {
 
 function sendMessage() {
   console.log('[actionButton] Set username');
+
   if (!messageInput.value) { 
     return;
   }
diff --git a/Web/WebSocket/websocket/frontend/src/messages/MessageFactory.ts b/Web/WebSocket/websocket/apps/frontend/src/messages/MessageFactory.ts
similarity index 100%
rename from Web/WebSocket/websocket/frontend/src/messages/MessageFactory.ts
rename to Web/WebSocket/websocket/apps/frontend/src/messages/MessageFactory.ts
diff --git a/Web/WebSocket/websocket/frontend/src/styles.css b/Web/WebSocket/websocket/apps/frontend/src/styles.css
similarity index 100%
rename from Web/WebSocket/websocket/frontend/src/styles.css
rename to Web/WebSocket/websocket/apps/frontend/src/styles.css
diff --git a/Web/WebSocket/websocket/frontend/src/websockets/WebSocketConnection.ts b/Web/WebSocket/websocket/apps/frontend/src/websockets/WebSocketConnection.ts
similarity index 100%
rename from Web/WebSocket/websocket/frontend/src/websockets/WebSocketConnection.ts
rename to Web/WebSocket/websocket/apps/frontend/src/websockets/WebSocketConnection.ts
diff --git a/Web/WebSocket/websocket/frontend/src/websockets/WebSocketConnectionStatus.ts b/Web/WebSocket/websocket/apps/frontend/src/websockets/WebSocketConnectionStatus.ts
similarity index 100%
rename from Web/WebSocket/websocket/frontend/src/websockets/WebSocketConnectionStatus.ts
rename to Web/WebSocket/websocket/apps/frontend/src/websockets/WebSocketConnectionStatus.ts
diff --git a/Web/WebSocket/websocket/apps/frontend/tsconfig.json b/Web/WebSocket/websocket/apps/frontend/tsconfig.json
new file mode 100644
index 0000000..a9ed56a
--- /dev/null
+++ b/Web/WebSocket/websocket/apps/frontend/tsconfig.json
@@ -0,0 +1,30 @@
+{
+  "extends": "../../tsconfig.json",
+  "compilerOptions": {
+    "target": "ES2022",
+    "useDefineForClassFields": true,
+    "module": "ESNext",
+    "lib": ["ES2022", "DOM", "DOM.Iterable"],
+    "types": ["vite/client"],
+    "skipLibCheck": true,
+
+    /* Bundler mode */
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "moduleDetection": "force",
+    "noEmit": true,
+
+    /* Linting */
+    "strict": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "erasableSyntaxOnly": false,
+    "noFallthroughCasesInSwitch": true,
+    "noUncheckedSideEffectImports": true
+  },
+  "include": ["src"],
+  "references": [
+    { "path": "../../packages/shared-types" }
+  ]
+}
diff --git a/Web/WebSocket/websocket/frontend/types/Units.ts b/Web/WebSocket/websocket/apps/frontend/types/Units.ts
similarity index 100%
rename from Web/WebSocket/websocket/frontend/types/Units.ts
rename to Web/WebSocket/websocket/apps/frontend/types/Units.ts
diff --git a/Web/WebSocket/websocket/server/assets/favicon/about.txt b/Web/WebSocket/websocket/apps/server/assets/favicon/about.txt
similarity index 100%
rename from Web/WebSocket/websocket/server/assets/favicon/about.txt
rename to Web/WebSocket/websocket/apps/server/assets/favicon/about.txt
diff --git a/Web/WebSocket/websocket/server/assets/favicon/android-chrome-192x192.png b/Web/WebSocket/websocket/apps/server/assets/favicon/android-chrome-192x192.png
similarity index 100%
rename from Web/WebSocket/websocket/server/assets/favicon/android-chrome-192x192.png
rename to Web/WebSocket/websocket/apps/server/assets/favicon/android-chrome-192x192.png
diff --git a/Web/WebSocket/websocket/server/assets/favicon/android-chrome-512x512.png b/Web/WebSocket/websocket/apps/server/assets/favicon/android-chrome-512x512.png
similarity index 100%
rename from Web/WebSocket/websocket/server/assets/favicon/android-chrome-512x512.png
rename to Web/WebSocket/websocket/apps/server/assets/favicon/android-chrome-512x512.png
diff --git a/Web/WebSocket/websocket/server/assets/favicon/apple-touch-icon.png b/Web/WebSocket/websocket/apps/server/assets/favicon/apple-touch-icon.png
similarity index 100%
rename from Web/WebSocket/websocket/server/assets/favicon/apple-touch-icon.png
rename to Web/WebSocket/websocket/apps/server/assets/favicon/apple-touch-icon.png
diff --git a/Web/WebSocket/websocket/server/assets/favicon/favicon-16x16.png b/Web/WebSocket/websocket/apps/server/assets/favicon/favicon-16x16.png
similarity index 100%
rename from Web/WebSocket/websocket/server/assets/favicon/favicon-16x16.png
rename to Web/WebSocket/websocket/apps/server/assets/favicon/favicon-16x16.png
diff --git a/Web/WebSocket/websocket/server/assets/favicon/favicon-32x32.png b/Web/WebSocket/websocket/apps/server/assets/favicon/favicon-32x32.png
similarity index 100%
rename from Web/WebSocket/websocket/server/assets/favicon/favicon-32x32.png
rename to Web/WebSocket/websocket/apps/server/assets/favicon/favicon-32x32.png
diff --git a/Web/WebSocket/websocket/server/assets/favicon/favicon.ico b/Web/WebSocket/websocket/apps/server/assets/favicon/favicon.ico
similarity index 100%
rename from Web/WebSocket/websocket/server/assets/favicon/favicon.ico
rename to Web/WebSocket/websocket/apps/server/assets/favicon/favicon.ico
diff --git a/Web/WebSocket/websocket/server/assets/favicon/site.webmanifest b/Web/WebSocket/websocket/apps/server/assets/favicon/site.webmanifest
similarity index 100%
rename from Web/WebSocket/websocket/server/assets/favicon/site.webmanifest
rename to Web/WebSocket/websocket/apps/server/assets/favicon/site.webmanifest
diff --git a/Web/WebSocket/websocket/server/eslint.config.ts b/Web/WebSocket/websocket/apps/server/eslint.config.ts
similarity index 100%
rename from Web/WebSocket/websocket/server/eslint.config.ts
rename to Web/WebSocket/websocket/apps/server/eslint.config.ts
diff --git a/Web/WebSocket/websocket/server/package.json b/Web/WebSocket/websocket/apps/server/package.json
similarity index 93%
rename from Web/WebSocket/websocket/server/package.json
rename to Web/WebSocket/websocket/apps/server/package.json
index a21ca16..f4420d4 100644
--- a/Web/WebSocket/websocket/server/package.json
+++ b/Web/WebSocket/websocket/apps/server/package.json
@@ -2,15 +2,17 @@
   "name": "@techniker-me/websocket-server",
   "version": "0.0.0",
   "type": "module",
+  "private": true,
   "scripts": {
-    "preinstall": "npm prune",
     "format": "prettier --write .",
     "prelint": "npm install",
     "lint": "eslint --max-warnings 0 .",
     "prelint:fix": "npm run format",
     "lint:fix": "eslint --fix .",
     "dev": "tsx watch --clear-screen=false src/index.ts",
-    "typecheck": "tsc"
+    "build": "tsc",
+    "typecheck": "tsc",
+    "clean": "rm -rf dist"
   },
   "author": "Alexander Zinn",
   "license": "ISC",
@@ -44,6 +46,7 @@
     "@techniker-me/tools": "2025.0.16",
     "body-parser": "2.2.0",
     "cors": "2.8.5",
+    "express": "5.1.0",
     "lru-cache": "11.2.2",
     "moment": "2.30.1",
     "morgan": "1.10.1",
diff --git a/Web/WebSocket/websocket/server/src/health/HealthCheck.ts b/Web/WebSocket/websocket/apps/server/src/health/HealthCheck.ts
similarity index 100%
rename from Web/WebSocket/websocket/server/src/health/HealthCheck.ts
rename to Web/WebSocket/websocket/apps/server/src/health/HealthCheck.ts
diff --git a/Web/WebSocket/websocket/server/src/health/HealthCheckRoute.ts b/Web/WebSocket/websocket/apps/server/src/health/HealthCheckRoute.ts
similarity index 100%
rename from Web/WebSocket/websocket/server/src/health/HealthCheckRoute.ts
rename to Web/WebSocket/websocket/apps/server/src/health/HealthCheckRoute.ts
diff --git a/Web/WebSocket/websocket/server/src/health/IHealthCheck.ts b/Web/WebSocket/websocket/apps/server/src/health/IHealthCheck.ts
similarity index 100%
rename from Web/WebSocket/websocket/server/src/health/IHealthCheck.ts
rename to Web/WebSocket/websocket/apps/server/src/health/IHealthCheck.ts
diff --git a/Web/WebSocket/websocket/server/src/index.ts b/Web/WebSocket/websocket/apps/server/src/index.ts
similarity index 100%
rename from Web/WebSocket/websocket/server/src/index.ts
rename to Web/WebSocket/websocket/apps/server/src/index.ts
diff --git a/Web/WebSocket/websocket/server/src/lang/Assert.ts b/Web/WebSocket/websocket/apps/server/src/lang/Assert.ts
similarity index 100%
rename from Web/WebSocket/websocket/server/src/lang/Assert.ts
rename to Web/WebSocket/websocket/apps/server/src/lang/Assert.ts
diff --git a/Web/WebSocket/websocket/server/src/lang/Strings.ts b/Web/WebSocket/websocket/apps/server/src/lang/Strings.ts
similarity index 100%
rename from Web/WebSocket/websocket/server/src/lang/Strings.ts
rename to Web/WebSocket/websocket/apps/server/src/lang/Strings.ts
diff --git a/Web/WebSocket/websocket/server/src/net/http/HttpServer.ts b/Web/WebSocket/websocket/apps/server/src/net/http/HttpServer.ts
similarity index 100%
rename from Web/WebSocket/websocket/server/src/net/http/HttpServer.ts
rename to Web/WebSocket/websocket/apps/server/src/net/http/HttpServer.ts
diff --git a/Web/WebSocket/websocket/server/src/net/http/IRoutes.ts b/Web/WebSocket/websocket/apps/server/src/net/http/IRoutes.ts
similarity index 100%
rename from Web/WebSocket/websocket/server/src/net/http/IRoutes.ts
rename to Web/WebSocket/websocket/apps/server/src/net/http/IRoutes.ts
diff --git a/Web/WebSocket/websocket/server/src/net/websocket/WebSocketServer.ts b/Web/WebSocket/websocket/apps/server/src/net/websocket/WebSocketServer.ts
similarity index 100%
rename from Web/WebSocket/websocket/server/src/net/websocket/WebSocketServer.ts
rename to Web/WebSocket/websocket/apps/server/src/net/websocket/WebSocketServer.ts
diff --git a/Web/WebSocket/websocket/server/src/types/Units.ts b/Web/WebSocket/websocket/apps/server/src/types/Units.ts
similarity index 100%
rename from Web/WebSocket/websocket/server/src/types/Units.ts
rename to Web/WebSocket/websocket/apps/server/src/types/Units.ts
diff --git a/Web/WebSocket/websocket/server/src/types/modules.d.ts b/Web/WebSocket/websocket/apps/server/src/types/modules.d.ts
similarity index 100%
rename from Web/WebSocket/websocket/server/src/types/modules.d.ts
rename to Web/WebSocket/websocket/apps/server/src/types/modules.d.ts
diff --git a/Web/WebSocket/websocket/server/src/types/optional.ts b/Web/WebSocket/websocket/apps/server/src/types/optional.ts
similarity index 100%
rename from Web/WebSocket/websocket/server/src/types/optional.ts
rename to Web/WebSocket/websocket/apps/server/src/types/optional.ts
diff --git a/Web/WebSocket/websocket/server/tsconfig.json b/Web/WebSocket/websocket/apps/server/tsconfig.json
similarity index 67%
rename from Web/WebSocket/websocket/server/tsconfig.json
rename to Web/WebSocket/websocket/apps/server/tsconfig.json
index 8e5e450..0d63722 100644
--- a/Web/WebSocket/websocket/server/tsconfig.json
+++ b/Web/WebSocket/websocket/apps/server/tsconfig.json
@@ -1,17 +1,13 @@
 {
+  "extends": "../../tsconfig.json",
   "compilerOptions": {
     "target": "es2022",
     "lib": ["es2022"],
     "moduleResolution": "node",
-    "allowSyntheticDefaultImports": true,
-    "skipLibCheck": true,
-    "moduleDetection": "force",
     "module": "Preserve",
     "resolveJsonModule": true,
     "allowJs": false,
-    "esModuleInterop": true,
     "isolatedModules": true,
-    "strict": true,
     "noImplicitReturns": true,
     "noUncheckedIndexedAccess": true,
     "noImplicitOverride": true,
@@ -20,9 +16,15 @@
     "noFallthroughCasesInSwitch": true,
     "noUnusedLocals": true,
     "noUnusedParameters": true,
-    "forceConsistentCasingInFileNames": true,
-    "noEmit": true
+    "noEmit": false,
+    "outDir": "./dist",
+    "rootDir": "./src",
+    "composite": true,
+    "declaration": true
   },
   "include": ["src/**/*"],
-  "exclude": ["node_modules"]
+  "exclude": ["node_modules", "dist"],
+  "references": [
+    { "path": "../../packages/shared-types" }
+  ]
 }
diff --git a/Web/WebSocket/websocket/package-lock.json b/Web/WebSocket/websocket/package-lock.json
deleted file mode 100644
index 0f7f675..0000000
--- a/Web/WebSocket/websocket/package-lock.json
+++ /dev/null
@@ -1,1032 +0,0 @@
-{
-  "name": "websocket",
-  "lockfileVersion": 3,
-  "requires": true,
-  "packages": {
-    "": {
-      "dependencies": {
-        "body-parser": "^2.2.0",
-        "compression": "^1.8.1",
-        "express": "^5.1.0"
-      },
-      "devDependencies": {
-        "@types/compression": "^1.8.1",
-        "@types/express": "^5.0.3"
-      }
-    },
-    "node_modules/@types/body-parser": {
-      "version": "1.19.6",
-      "resolved": "https://registry.npmjs.org/@types/body-parser/-/body-parser-1.19.6.tgz",
-      "integrity": "sha512-HLFeCYgz89uk22N5Qg3dvGvsv46B8GLvKKo1zKG4NybA8U2DiEO3w9lqGg29t/tfLRJpJ6iQxnVw4OnB7MoM9g==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "@types/connect": "*",
-        "@types/node": "*"
-      }
-    },
-    "node_modules/@types/compression": {
-      "version": "1.8.1",
-      "resolved": "https://registry.npmjs.org/@types/compression/-/compression-1.8.1.tgz",
-      "integrity": "sha512-kCFuWS0ebDbmxs0AXYn6e2r2nrGAb5KwQhknjSPSPgJcGd8+HVSILlUyFhGqML2gk39HcG7D1ydW9/qpYkN00Q==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "@types/express": "*",
-        "@types/node": "*"
-      }
-    },
-    "node_modules/@types/connect": {
-      "version": "3.4.38",
-      "resolved": "https://registry.npmjs.org/@types/connect/-/connect-3.4.38.tgz",
-      "integrity": "sha512-K6uROf1LD88uDQqJCktA4yzL1YYAK6NgfsI0v/mTgyPKWsX1CnJ0XPSDhViejru1GcRkLWb8RlzFYJRqGUbaug==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "@types/node": "*"
-      }
-    },
-    "node_modules/@types/express": {
-      "version": "5.0.3",
-      "resolved": "https://registry.npmjs.org/@types/express/-/express-5.0.3.tgz",
-      "integrity": "sha512-wGA0NX93b19/dZC1J18tKWVIYWyyF2ZjT9vin/NRu0qzzvfVzWjs04iq2rQ3H65vCTQYlRqs3YHfY7zjdV+9Kw==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "@types/body-parser": "*",
-        "@types/express-serve-static-core": "^5.0.0",
-        "@types/serve-static": "*"
-      }
-    },
-    "node_modules/@types/express-serve-static-core": {
-      "version": "5.0.7",
-      "resolved": "https://registry.npmjs.org/@types/express-serve-static-core/-/express-serve-static-core-5.0.7.tgz",
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-      "license": "MIT",
-      "dependencies": {
-        "@types/node": "*",
-        "@types/qs": "*",
-        "@types/range-parser": "*",
-        "@types/send": "*"
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-    },
-    "node_modules/@types/http-errors": {
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-      "license": "MIT"
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-      "license": "MIT",
-      "dependencies": {
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-        "@types/node": "*",
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-      "dependencies": {
-        "mime-types": "^3.0.0",
-        "negotiator": "^1.0.0"
-      },
-      "engines": {
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-        "on-finished": "^2.4.1",
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-        "raw-body": "^3.0.0",
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-      "engines": {
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-      "funding": {
-        "url": "https://github.com/sponsors/ljharb"
-      }
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-      "version": "2.0.18",
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-      "license": "MIT",
-      "dependencies": {
-        "bytes": "3.1.2",
-        "compressible": "~2.0.18",
-        "debug": "2.6.9",
-        "negotiator": "~0.6.4",
-        "on-headers": "~1.1.0",
-        "safe-buffer": "5.2.1",
-        "vary": "~1.1.2"
-      },
-      "engines": {
-        "node": ">= 0.8.0"
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-    },
-    "node_modules/compression/node_modules/debug": {
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diff --git a/Web/WebSocket/websocket/package.json b/Web/WebSocket/websocket/package.json
index ce14af2..6faf409 100644
--- a/Web/WebSocket/websocket/package.json
+++ b/Web/WebSocket/websocket/package.json
@@ -1,11 +1,26 @@
 {
-  "dependencies": {
-    "body-parser": "^2.2.0",
-    "compression": "^1.8.1",
-    "express": "^5.1.0"
+  "name": "@techniker-me/websocket-chat",
+  "version": "0.0.0",
+  "private": true,
+  "workspaces": [
+    "apps/*",
+    "packages/*"
+  ],
+  "scripts": {
+    "build": "npm run build --workspaces",
+    "build:types": "npm run build -w @techniker-me/websocket-shared-types",
+    "dev": "npm run dev --workspaces --if-present",
+    "dev:server": "npm run dev -w @techniker-me/websocket-server",
+    "dev:frontend": "npm run dev -w @techniker-me/websocket-frontend",
+    "dev:all": "concurrently \"npm run dev:server\" \"npm run dev:frontend\"",
+    "clean": "npm run clean --workspaces --if-present",
+    "lint": "npm run lint --workspaces --if-present",
+    "typecheck": "npm run typecheck --workspaces --if-present",
+    "start": "npm run build:types && npm run dev:all"
   },
   "devDependencies": {
-    "@types/compression": "^1.8.1",
-    "@types/express": "^5.0.3"
-  }
+    "typescript": "5.9.2",
+    "concurrently": "8.2.2"
+  },
+  "author": "Alexander Zinn"
 }
diff --git a/Web/WebSocket/websocket/packages/shared-types/package.json b/Web/WebSocket/websocket/packages/shared-types/package.json
new file mode 100644
index 0000000..da8f94d
--- /dev/null
+++ b/Web/WebSocket/websocket/packages/shared-types/package.json
@@ -0,0 +1,17 @@
+{
+  "name": "@techniker-me/websocket-shared-types",
+  "version": "0.0.0",
+  "type": "module",
+  "private": true,
+  "main": "./dist/index.js",
+  "types": "./dist/index.d.ts",
+  "scripts": {
+    "build": "tsc",
+    "clean": "rm -rf dist",
+    "typecheck": "tsc"
+  },
+  "devDependencies": {
+    "typescript": "~5.8.3"
+  },
+  "dependencies": {}
+}
diff --git a/Web/WebSocket/websocket/packages/shared-types/src/index.ts b/Web/WebSocket/websocket/packages/shared-types/src/index.ts
new file mode 100644
index 0000000..300addd
--- /dev/null
+++ b/Web/WebSocket/websocket/packages/shared-types/src/index.ts
@@ -0,0 +1,41 @@
+// Shared types for WebSocket communication
+
+export type Milliseconds = number;
+export type Seconds = number;
+
+export interface PingMessage {
+  ping: {
+    sentAt: number;
+  };
+}
+
+export interface PongMessage {
+  pong: {
+    sentAt: number;
+    rtt: number;
+  };
+}
+
+export interface ChatMessage {
+  message: {
+    author: string;
+    recipient: string;
+    payload: string;
+  };
+}
+
+export type WebSocketMessage = PingMessage | PongMessage | ChatMessage;
+
+export enum WebSocketConnectionStatus {
+  Connecting = 'Connecting',
+  Open = 'Open', 
+  Closed = 'Closed',
+  Error = 'Error'
+}
+
+export interface ExtendedWebSocket {
+  id: string;
+  remoteAddress: string;
+  isOpen(): boolean;
+  isClosed(): boolean;
+}
diff --git a/Web/WebSocket/websocket/packages/shared-types/tsconfig.json b/Web/WebSocket/websocket/packages/shared-types/tsconfig.json
new file mode 100644
index 0000000..9b931e5
--- /dev/null
+++ b/Web/WebSocket/websocket/packages/shared-types/tsconfig.json
@@ -0,0 +1,17 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "ESNext",
+    "moduleResolution": "bundler",
+    "allowSyntheticDefaultImports": true,
+    "esModuleInterop": true,
+    "allowJs": true,
+    "strict": true,
+    "noEmit": false,
+    "declaration": true,
+    "outDir": "./dist",
+    "rootDir": "./src"
+  },
+  "include": ["src/**/*"],
+  "exclude": ["node_modules", "dist"]
+}
diff --git a/Web/WebSocket/websocket/tsconfig.json b/Web/WebSocket/websocket/tsconfig.json
new file mode 100644
index 0000000..b051dfb
--- /dev/null
+++ b/Web/WebSocket/websocket/tsconfig.json
@@ -0,0 +1,22 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "ESNext",
+    "moduleResolution": "bundler",
+    "allowSyntheticDefaultImports": true,
+    "esModuleInterop": true,
+    "allowJs": true,
+    "strict": true,
+    "noEmit": true,
+    "skipLibCheck": true,
+    "composite": true,
+    "incremental": true,
+    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.tsbuildinfo"
+  },
+  "references": [
+    { "path": "./packages/shared-types" },
+    { "path": "./apps/server" },
+    { "path": "./apps/frontend" }
+  ],
+  "files": []
+}
diff --git a/Web/bfcache/.gitignore b/Web/bfcache/.gitignore
new file mode 100644
index 0000000..a547bf3
--- /dev/null
+++ b/Web/bfcache/.gitignore
@@ -0,0 +1,24 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+node_modules
+dist
+dist-ssr
+*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?
diff --git a/Web/bfcache/frontend/bun.lock b/Web/bfcache/frontend/bun.lock
new file mode 100644
index 0000000..a9d1759
--- /dev/null
+++ b/Web/bfcache/frontend/bun.lock
@@ -0,0 +1,133 @@
+{
+  "lockfileVersion": 1,
+  "workspaces": {
+    "": {
+      "name": "bfcache",
+      "devDependencies": {
+        "typescript": "~5.8.3",
+        "vite": "^7.1.2",
+      },
+    },
+  },
+  "packages": {
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+
+    "@esbuild/android-arm": ["@esbuild/android-arm@0.25.10", "", { "os": "android", "cpu": "arm" }, "sha512-dQAxF1dW1C3zpeCDc5KqIYuZ1tgAdRXNoZP7vkBIRtKZPYe2xVr/d3SkirklCHudW1B45tGiUlz2pUWDfbDD4w=="],
+
+    "@esbuild/android-arm64": ["@esbuild/android-arm64@0.25.10", "", { "os": "android", "cpu": "arm64" }, "sha512-LSQa7eDahypv/VO6WKohZGPSJDq5OVOo3UoFR1E4t4Gj1W7zEQMUhI+lo81H+DtB+kP+tDgBp+M4oNCwp6kffg=="],
+
+    "@esbuild/android-x64": ["@esbuild/android-x64@0.25.10", "", { "os": "android", "cpu": "x64" }, "sha512-MiC9CWdPrfhibcXwr39p9ha1x0lZJ9KaVfvzA0Wxwz9ETX4v5CHfF09bx935nHlhi+MxhA63dKRRQLiVgSUtEg=="],
+
+    "@esbuild/darwin-arm64": ["@esbuild/darwin-arm64@0.25.10", "", { "os": "darwin", "cpu": "arm64" }, "sha512-JC74bdXcQEpW9KkV326WpZZjLguSZ3DfS8wrrvPMHgQOIEIG/sPXEN/V8IssoJhbefLRcRqw6RQH2NnpdprtMA=="],
+
+    "@esbuild/darwin-x64": ["@esbuild/darwin-x64@0.25.10", "", { "os": "darwin", "cpu": "x64" }, "sha512-tguWg1olF6DGqzws97pKZ8G2L7Ig1vjDmGTwcTuYHbuU6TTjJe5FXbgs5C1BBzHbJ2bo1m3WkQDbWO2PvamRcg=="],
+
+    "@esbuild/freebsd-arm64": ["@esbuild/freebsd-arm64@0.25.10", "", { "os": "freebsd", "cpu": "arm64" }, "sha512-3ZioSQSg1HT2N05YxeJWYR+Libe3bREVSdWhEEgExWaDtyFbbXWb49QgPvFH8u03vUPX10JhJPcz7s9t9+boWg=="],
+
+    "@esbuild/freebsd-x64": ["@esbuild/freebsd-x64@0.25.10", "", { "os": "freebsd", "cpu": "x64" }, "sha512-LLgJfHJk014Aa4anGDbh8bmI5Lk+QidDmGzuC2D+vP7mv/GeSN+H39zOf7pN5N8p059FcOfs2bVlrRr4SK9WxA=="],
+
+    "@esbuild/linux-arm": ["@esbuild/linux-arm@0.25.10", "", { "os": "linux", "cpu": "arm" }, "sha512-oR31GtBTFYCqEBALI9r6WxoU/ZofZl962pouZRTEYECvNF/dtXKku8YXcJkhgK/beU+zedXfIzHijSRapJY3vg=="],
+
+    "@esbuild/linux-arm64": ["@esbuild/linux-arm64@0.25.10", "", { "os": "linux", "cpu": "arm64" }, "sha512-5luJWN6YKBsawd5f9i4+c+geYiVEw20FVW5x0v1kEMWNq8UctFjDiMATBxLvmmHA4bf7F6hTRaJgtghFr9iziQ=="],
+
+    "@esbuild/linux-ia32": ["@esbuild/linux-ia32@0.25.10", "", { "os": "linux", "cpu": "ia32" }, "sha512-NrSCx2Kim3EnnWgS4Txn0QGt0Xipoumb6z6sUtl5bOEZIVKhzfyp/Lyw4C1DIYvzeW/5mWYPBFJU3a/8Yr75DQ=="],
+
+    "@esbuild/linux-loong64": ["@esbuild/linux-loong64@0.25.10", "", { "os": "linux", "cpu": "none" }, "sha512-xoSphrd4AZda8+rUDDfD9J6FUMjrkTz8itpTITM4/xgerAZZcFW7Dv+sun7333IfKxGG8gAq+3NbfEMJfiY+Eg=="],
+
+    "@esbuild/linux-mips64el": ["@esbuild/linux-mips64el@0.25.10", "", { "os": "linux", "cpu": "none" }, "sha512-ab6eiuCwoMmYDyTnyptoKkVS3k8fy/1Uvq7Dj5czXI6DF2GqD2ToInBI0SHOp5/X1BdZ26RKc5+qjQNGRBelRA=="],
+
+    "@esbuild/linux-ppc64": ["@esbuild/linux-ppc64@0.25.10", "", { "os": "linux", "cpu": "ppc64" }, "sha512-NLinzzOgZQsGpsTkEbdJTCanwA5/wozN9dSgEl12haXJBzMTpssebuXR42bthOF3z7zXFWH1AmvWunUCkBE4EA=="],
+
+    "@esbuild/linux-riscv64": ["@esbuild/linux-riscv64@0.25.10", "", { "os": "linux", "cpu": "none" }, "sha512-FE557XdZDrtX8NMIeA8LBJX3dC2M8VGXwfrQWU7LB5SLOajfJIxmSdyL/gU1m64Zs9CBKvm4UAuBp5aJ8OgnrA=="],
+
+    "@esbuild/linux-s390x": ["@esbuild/linux-s390x@0.25.10", "", { "os": "linux", "cpu": "s390x" }, "sha512-3BBSbgzuB9ajLoVZk0mGu+EHlBwkusRmeNYdqmznmMc9zGASFjSsxgkNsqmXugpPk00gJ0JNKh/97nxmjctdew=="],
+
+    "@esbuild/linux-x64": ["@esbuild/linux-x64@0.25.10", "", { "os": "linux", "cpu": "x64" }, "sha512-QSX81KhFoZGwenVyPoberggdW1nrQZSvfVDAIUXr3WqLRZGZqWk/P4T8p2SP+de2Sr5HPcvjhcJzEiulKgnxtA=="],
+
+    "@esbuild/netbsd-arm64": ["@esbuild/netbsd-arm64@0.25.10", "", { "os": "none", "cpu": "arm64" }, "sha512-AKQM3gfYfSW8XRk8DdMCzaLUFB15dTrZfnX8WXQoOUpUBQ+NaAFCP1kPS/ykbbGYz7rxn0WS48/81l9hFl3u4A=="],
+
+    "@esbuild/netbsd-x64": ["@esbuild/netbsd-x64@0.25.10", "", { "os": "none", "cpu": "x64" }, "sha512-7RTytDPGU6fek/hWuN9qQpeGPBZFfB4zZgcz2VK2Z5VpdUxEI8JKYsg3JfO0n/Z1E/6l05n0unDCNc4HnhQGig=="],
+
+    "@esbuild/openbsd-arm64": ["@esbuild/openbsd-arm64@0.25.10", "", { "os": "openbsd", "cpu": "arm64" }, "sha512-5Se0VM9Wtq797YFn+dLimf2Zx6McttsH2olUBsDml+lm0GOCRVebRWUvDtkY4BWYv/3NgzS8b/UM3jQNh5hYyw=="],
+
+    "@esbuild/openbsd-x64": ["@esbuild/openbsd-x64@0.25.10", "", { "os": "openbsd", "cpu": "x64" }, "sha512-XkA4frq1TLj4bEMB+2HnI0+4RnjbuGZfet2gs/LNs5Hc7D89ZQBHQ0gL2ND6Lzu1+QVkjp3x1gIcPKzRNP8bXw=="],
+
+    "@esbuild/openharmony-arm64": ["@esbuild/openharmony-arm64@0.25.10", "", { "os": "none", "cpu": "arm64" }, "sha512-AVTSBhTX8Y/Fz6OmIVBip9tJzZEUcY8WLh7I59+upa5/GPhh2/aM6bvOMQySspnCCHvFi79kMtdJS1w0DXAeag=="],
+
+    "@esbuild/sunos-x64": ["@esbuild/sunos-x64@0.25.10", "", { "os": "sunos", "cpu": "x64" }, "sha512-fswk3XT0Uf2pGJmOpDB7yknqhVkJQkAQOcW/ccVOtfx05LkbWOaRAtn5SaqXypeKQra1QaEa841PgrSL9ubSPQ=="],
+
+    "@esbuild/win32-arm64": ["@esbuild/win32-arm64@0.25.10", "", { "os": "win32", "cpu": "arm64" }, "sha512-ah+9b59KDTSfpaCg6VdJoOQvKjI33nTaQr4UluQwW7aEwZQsbMCfTmfEO4VyewOxx4RaDT/xCy9ra2GPWmO7Kw=="],
+
+    "@esbuild/win32-ia32": ["@esbuild/win32-ia32@0.25.10", "", { "os": "win32", "cpu": "ia32" }, "sha512-QHPDbKkrGO8/cz9LKVnJU22HOi4pxZnZhhA2HYHez5Pz4JeffhDjf85E57Oyco163GnzNCVkZK0b/n4Y0UHcSw=="],
+
+    "@esbuild/win32-x64": ["@esbuild/win32-x64@0.25.10", "", { "os": "win32", "cpu": "x64" }, "sha512-9KpxSVFCu0iK1owoez6aC/s/EdUQLDN3adTxGCqxMVhrPDj6bt5dbrHDXUuq+Bs2vATFBBrQS5vdQ/Ed2P+nbw=="],
+
+    "@rollup/rollup-android-arm-eabi": ["@rollup/rollup-android-arm-eabi@4.50.2", "", { "os": "android", "cpu": "arm" }, "sha512-uLN8NAiFVIRKX9ZQha8wy6UUs06UNSZ32xj6giK/rmMXAgKahwExvK6SsmgU5/brh4w/nSgj8e0k3c1HBQpa0A=="],
+
+    "@rollup/rollup-android-arm64": ["@rollup/rollup-android-arm64@4.50.2", "", { "os": "android", "cpu": "arm64" }, "sha512-oEouqQk2/zxxj22PNcGSskya+3kV0ZKH+nQxuCCOGJ4oTXBdNTbv+f/E3c74cNLeMO1S5wVWacSws10TTSB77g=="],
+
+    "@rollup/rollup-darwin-arm64": ["@rollup/rollup-darwin-arm64@4.50.2", "", { "os": "darwin", "cpu": "arm64" }, "sha512-OZuTVTpj3CDSIxmPgGH8en/XtirV5nfljHZ3wrNwvgkT5DQLhIKAeuFSiwtbMto6oVexV0k1F1zqURPKf5rI1Q=="],
+
+    "@rollup/rollup-darwin-x64": ["@rollup/rollup-darwin-x64@4.50.2", "", { "os": "darwin", "cpu": "x64" }, "sha512-Wa/Wn8RFkIkr1vy1k1PB//VYhLnlnn5eaJkfTQKivirOvzu5uVd2It01ukeQstMursuz7S1bU+8WW+1UPXpa8A=="],
+
+    "@rollup/rollup-freebsd-arm64": ["@rollup/rollup-freebsd-arm64@4.50.2", "", { "os": "freebsd", "cpu": "arm64" }, "sha512-QkzxvH3kYN9J1w7D1A+yIMdI1pPekD+pWx7G5rXgnIlQ1TVYVC6hLl7SOV9pi5q9uIDF9AuIGkuzcbF7+fAhow=="],
+
+    "@rollup/rollup-freebsd-x64": ["@rollup/rollup-freebsd-x64@4.50.2", "", { "os": "freebsd", "cpu": "x64" }, "sha512-dkYXB0c2XAS3a3jmyDkX4Jk0m7gWLFzq1C3qUnJJ38AyxIF5G/dyS4N9B30nvFseCfgtCEdbYFhk0ChoCGxPog=="],
+
+    "@rollup/rollup-linux-arm-gnueabihf": ["@rollup/rollup-linux-arm-gnueabihf@4.50.2", "", { "os": "linux", "cpu": "arm" }, "sha512-9VlPY/BN3AgbukfVHAB8zNFWB/lKEuvzRo1NKev0Po8sYFKx0i+AQlCYftgEjcL43F2h9Ui1ZSdVBc4En/sP2w=="],
+
+    "@rollup/rollup-linux-arm-musleabihf": ["@rollup/rollup-linux-arm-musleabihf@4.50.2", "", { "os": "linux", "cpu": "arm" }, "sha512-+GdKWOvsifaYNlIVf07QYan1J5F141+vGm5/Y8b9uCZnG/nxoGqgCmR24mv0koIWWuqvFYnbURRqw1lv7IBINw=="],
+
+    "@rollup/rollup-linux-arm64-gnu": ["@rollup/rollup-linux-arm64-gnu@4.50.2", "", { "os": "linux", "cpu": "arm64" }, "sha512-df0Eou14ojtUdLQdPFnymEQteENwSJAdLf5KCDrmZNsy1c3YaCNaJvYsEUHnrg+/DLBH612/R0xd3dD03uz2dg=="],
+
+    "@rollup/rollup-linux-arm64-musl": ["@rollup/rollup-linux-arm64-musl@4.50.2", "", { "os": "linux", "cpu": "arm64" }, "sha512-iPeouV0UIDtz8j1YFR4OJ/zf7evjauqv7jQ/EFs0ClIyL+by++hiaDAfFipjOgyz6y6xbDvJuiU4HwpVMpRFDQ=="],
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+    "@rollup/rollup-linux-loong64-gnu": ["@rollup/rollup-linux-loong64-gnu@4.50.2", "", { "os": "linux", "cpu": "none" }, "sha512-OL6KaNvBopLlj5fTa5D5bau4W82f+1TyTZRr2BdnfsrnQnmdxh4okMxR2DcDkJuh4KeoQZVuvHvzuD/lyLn2Kw=="],
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+    "@rollup/rollup-linux-ppc64-gnu": ["@rollup/rollup-linux-ppc64-gnu@4.50.2", "", { "os": "linux", "cpu": "ppc64" }, "sha512-I21VJl1w6z/K5OTRl6aS9DDsqezEZ/yKpbqlvfHbW0CEF5IL8ATBMuUx6/mp683rKTK8thjs/0BaNrZLXetLag=="],
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+
+    "@rollup/rollup-linux-riscv64-musl": ["@rollup/rollup-linux-riscv64-musl@4.50.2", "", { "os": "linux", "cpu": "none" }, "sha512-82rBSEXRv5qtKyr0xZ/YMF531oj2AIpLZkeNYxmKNN6I2sVE9PGegN99tYDLK2fYHJITL1P2Lgb4ZXnv0PjQvw=="],
+
+    "@rollup/rollup-linux-s390x-gnu": ["@rollup/rollup-linux-s390x-gnu@4.50.2", "", { "os": "linux", "cpu": "s390x" }, "sha512-4Q3S3Hy7pC6uaRo9gtXUTJ+EKo9AKs3BXKc2jYypEcMQ49gDPFU2P1ariX9SEtBzE5egIX6fSUmbmGazwBVF9w=="],
+
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+
+    "@rollup/rollup-linux-x64-musl": ["@rollup/rollup-linux-x64-musl@4.50.2", "", { "os": "linux", "cpu": "x64" }, "sha512-HPNJwxPL3EmhzeAnsWQCM3DcoqOz3/IC6de9rWfGR8ZCuEHETi9km66bH/wG3YH0V3nyzyFEGUZeL5PKyy4xvw=="],
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+
+    "@rollup/rollup-win32-ia32-msvc": ["@rollup/rollup-win32-ia32-msvc@4.50.2", "", { "os": "win32", "cpu": "ia32" }, "sha512-cBaWmXqyfRhH8zmUxK3d3sAhEWLrtMjWBRwdMMHJIXSjvjLKvv49adxiEz+FJ8AP90apSDDBx2Tyd/WylV6ikA=="],
+
+    "@rollup/rollup-win32-x64-msvc": ["@rollup/rollup-win32-x64-msvc@4.50.2", "", { "os": "win32", "cpu": "x64" }, "sha512-APwKy6YUhvZaEoHyM+9xqmTpviEI+9eL7LoCH+aLcvWYHJ663qG5zx7WzWZY+a9qkg5JtzcMyJ9z0WtQBMDmgA=="],
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+    "@types/estree": ["@types/estree@1.0.8", "", {}, "sha512-dWHzHa2WqEXI/O1E9OjrocMTKJl2mSrEolh1Iomrv6U+JuNwaHXsXx9bLu5gG7BUWFIN0skIQJQ/L1rIex4X6w=="],
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+    "postcss": ["postcss@8.5.6", "", { "dependencies": { "nanoid": "^3.3.11", "picocolors": "^1.1.1", "source-map-js": "^1.2.1" } }, "sha512-3Ybi1tAuwAP9s0r1UQ2J4n5Y0G05bJkpUIO0/bI9MhwmD70S5aTWbXGBwxHrelT+XM1k6dM0pk+SwNkpTRN7Pg=="],
+
+    "rollup": ["rollup@4.50.2", "", { "dependencies": { "@types/estree": "1.0.8" }, "optionalDependencies": { "@rollup/rollup-android-arm-eabi": "4.50.2", "@rollup/rollup-android-arm64": "4.50.2", "@rollup/rollup-darwin-arm64": "4.50.2", "@rollup/rollup-darwin-x64": "4.50.2", "@rollup/rollup-freebsd-arm64": "4.50.2", "@rollup/rollup-freebsd-x64": "4.50.2", "@rollup/rollup-linux-arm-gnueabihf": "4.50.2", "@rollup/rollup-linux-arm-musleabihf": "4.50.2", "@rollup/rollup-linux-arm64-gnu": "4.50.2", "@rollup/rollup-linux-arm64-musl": "4.50.2", "@rollup/rollup-linux-loong64-gnu": "4.50.2", "@rollup/rollup-linux-ppc64-gnu": "4.50.2", "@rollup/rollup-linux-riscv64-gnu": "4.50.2", "@rollup/rollup-linux-riscv64-musl": "4.50.2", "@rollup/rollup-linux-s390x-gnu": "4.50.2", "@rollup/rollup-linux-x64-gnu": "4.50.2", "@rollup/rollup-linux-x64-musl": "4.50.2", "@rollup/rollup-openharmony-arm64": "4.50.2", "@rollup/rollup-win32-arm64-msvc": "4.50.2", "@rollup/rollup-win32-ia32-msvc": "4.50.2", "@rollup/rollup-win32-x64-msvc": "4.50.2", "fsevents": "~2.3.2" }, "bin": { "rollup": "dist/bin/rollup" } }, "sha512-BgLRGy7tNS9H66aIMASq1qSYbAAJV6Z6WR4QYTvj5FgF15rZ/ympT1uixHXwzbZUBDbkvqUI1KR0fH1FhMaQ9w=="],
+
+    "source-map-js": ["source-map-js@1.2.1", "", {}, "sha512-UXWMKhLOwVKb728IUtQPXxfYU+usdybtUrK/8uGE8CQMvrhOpwvzDBwj0QhSL7MQc7vIsISBG8VQ8+IDQxpfQA=="],
+
+    "tinyglobby": ["tinyglobby@0.2.15", "", { "dependencies": { "fdir": "^6.5.0", "picomatch": "^4.0.3" } }, "sha512-j2Zq4NyQYG5XMST4cbs02Ak8iJUdxRM0XI5QyxXuZOzKOINmWurp3smXu3y5wDcJrptwpSjgXHzIQxR0omXljQ=="],
+
+    "typescript": ["typescript@5.8.3", "", { "bin": { "tsc": "bin/tsc", "tsserver": "bin/tsserver" } }, "sha512-p1diW6TqL9L07nNxvRMM7hMMw4c5XOo/1ibL4aAIGmSAt9slTE1Xgw5KWuof2uTOvCg9BY7ZRi+GaF+7sfgPeQ=="],
+
+    "vite": ["vite@7.1.5", "", { "dependencies": { "esbuild": "^0.25.0", "fdir": "^6.5.0", "picomatch": "^4.0.3", "postcss": "^8.5.6", "rollup": "^4.43.0", "tinyglobby": "^0.2.15" }, "optionalDependencies": { "fsevents": "~2.3.3" }, "peerDependencies": { "@types/node": "^20.19.0 || >=22.12.0", "jiti": ">=1.21.0", "less": "^4.0.0", "lightningcss": "^1.21.0", "sass": "^1.70.0", "sass-embedded": "^1.70.0", "stylus": ">=0.54.8", "sugarss": "^5.0.0", "terser": "^5.16.0", "tsx": "^4.8.1", "yaml": "^2.4.2" }, "optionalPeers": ["@types/node", "jiti", "less", "lightningcss", "sass", "sass-embedded", "stylus", "sugarss", "terser", "tsx", "yaml"], "bin": { "vite": "bin/vite.js" } }, "sha512-4cKBO9wR75r0BeIWWWId9XK9Lj6La5X846Zw9dFfzMRw38IlTk2iCcUt6hsyiDRcPidc55ZParFYDXi0nXOeLQ=="],
+  }
+}
diff --git a/Web/bfcache/frontend/index.html b/Web/bfcache/frontend/index.html
new file mode 100644
index 0000000..7a8e629
--- /dev/null
+++ b/Web/bfcache/frontend/index.html
@@ -0,0 +1,48 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <link rel="stylesheet" href="/src/styles.css">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>bfcache</title>
+  </head>
+  <body>
+    <div id="app" class="flex-column-container">
+      <div class="flex-row-container">
+        <h1>bfcache</h1>
+        <div>
+          <br/>
+          <br/>
+          <br/>
+          <br/>
+          <p>WebSocket status: <span id="websocket-status">Offline</span></p>
+        </div>
+      </div>
+      <div class="flex-row-container">
+        <div>
+          <h2>Messages</h2>
+          <ul id="messages"></ul>
+        </div>
+      </div>
+      <div class="flex-row-container">
+        <div>
+          <h2>Send Message</h2>
+          <input type="text" id="message-input" required/>
+          <button id="send-button">Send</button>
+        </div>
+      </div>
+    </div>
+    <dialog id="login-dialog">
+      <form id="login-form">
+        <div>
+          <input type="text" id="username-input" autocomplete="username" placeholder="Enter a username" required/>
+        </div>
+        <!-- <input type="password" id="password-input" autocomplete="current-password" placeholder="Password" required/> -->
+        <div>
+          <button type="submit" id="login-button">Login</button>
+        </div>
+      </form>
+    </dialog>
+    <script type="module" src="/src/main.ts"></script>
+  </body>
+</html>
diff --git a/Web/WebSocket/websocket/frontend/package.json b/Web/bfcache/frontend/package.json
similarity index 60%
rename from Web/WebSocket/websocket/frontend/package.json
rename to Web/bfcache/frontend/package.json
index 4c2d420..85fcc08 100644
--- a/Web/WebSocket/websocket/frontend/package.json
+++ b/Web/bfcache/frontend/package.json
@@ -1,5 +1,5 @@
 {
-  "name": "websocket",
+  "name": "bfcache",
   "private": true,
   "version": "0.0.0",
   "type": "module",
@@ -10,10 +10,6 @@
   },
   "devDependencies": {
     "typescript": "~5.8.3",
-    "vite": "^7.1.7"
-  },
-  "dependencies": {
-    "@techniker-me/logger": "0.0.15",
-    "@techniker-me/tools": "2025.0.16"
+    "vite": "^7.1.2"
   }
 }
diff --git a/Web/bfcache/frontend/src/main.ts b/Web/bfcache/frontend/src/main.ts
new file mode 100644
index 0000000..e1bfe8e
--- /dev/null
+++ b/Web/bfcache/frontend/src/main.ts
@@ -0,0 +1,84 @@
+
+
+const websocketStatus = document.getElementById('websocket-status') as HTMLSpanElement;
+const messages = document.getElementById('messages') as HTMLUListElement;
+const messageInput = document.getElementById('message-input') as HTMLInputElement;
+const sendButton = document.getElementById('send-button') as HTMLButtonElement;
+const loginDialog = document.getElementById('login-dialog') as HTMLDialogElement;
+const usernameInput = document.getElementById('username-input') as HTMLInputElement;
+const loginForm = document.getElementById('login-form') as HTMLFormElement;
+
+let username: string = '';
+let websocket: WebSocket;
+
+window.addEventListener('beforeunload', () => {
+  disconnect(websocket);
+});
+
+function connect(): Promise<WebSocket> {
+    return new Promise((resolve, reject) => {
+        websocket = new WebSocket(`ws://${window.location.hostname}:4444`)
+        websocket.onopen = () => {
+            websocketStatus.textContent = 'Connected';
+
+            websocket.send(JSON.stringify({
+                type: 'login',
+                username
+            }));
+
+            resolve(websocket);
+        };
+
+        websocket.onerror = (event) => {
+            reject(event);
+        };
+
+        websocket.onclose = () => {
+            websocketStatus.textContent = 'Offline';
+        };
+
+        websocket.onclose = () => {
+            websocketStatus.textContent = 'Offline';
+        };
+
+        websocket.onerror = (event: Event) => {
+            websocketStatus.textContent = `Error [${event.toString()}]`;
+        };
+
+        websocket.onmessage = (event) => {
+            console.log('WebSocket message received:', event.data);
+            const message = document.createElement('li');
+            message.textContent = event.data;
+            messages.appendChild(message);
+        };
+
+        sendButton.onclick = () => sendMessage(websocket, messageInput.value);
+    });
+}
+
+function disconnect(websocket: WebSocket) {
+    websocket.close();
+}
+
+function login() {
+    connect();
+    loginDialog.close();
+}
+
+function sendMessage(websocket: WebSocket, message: string) {
+    if (!message) {
+        return;
+    }
+
+    console.log('Sending message:', message);
+    websocket.send(message);
+    messageInput.value = '';
+}
+
+loginForm.onsubmit = (event) => {
+    event.preventDefault();
+    loginDialog.close();
+    login(usernameInput.value);
+};
+
+loginDialog.showModal();
\ No newline at end of file
diff --git a/Web/bfcache/frontend/src/styles.css b/Web/bfcache/frontend/src/styles.css
new file mode 100644
index 0000000..77b90ee
--- /dev/null
+++ b/Web/bfcache/frontend/src/styles.css
@@ -0,0 +1,49 @@
+body {
+    background-color: #f0f0f0;
+    font-family: Arial, sans-serif;
+    margin: 0;
+    padding: 0;
+}
+
+h3 {
+    text-align: center;
+}
+
+.container {
+    max-width: 1200px;
+    margin: 0 auto;
+    padding: 20px;
+}
+
+.flex-column-container {
+    display: flex;
+    flex-direction: column;
+    justify-content: space-between;
+    align-items: center;
+}
+
+.flex-row-container {
+    display: flex;
+    flex-direction: row;
+    justify-content: space-between;
+    align-items: center;
+}
+
+.flex-item {
+    flex: 1;
+}
+
+#login-button {
+    margin: 10px auto;
+    width: 100%;
+    padding: 10px 20px;
+    background-color: #007bff;
+    color: white;
+    border: none;
+    border-radius: 5px;
+    cursor: pointer;
+}
+
+#login-button:hover {
+    background-color: #0056b3;
+}
\ No newline at end of file
diff --git a/Web/bfcache/frontend/src/vite-env.d.ts b/Web/bfcache/frontend/src/vite-env.d.ts
new file mode 100644
index 0000000..11f02fe
--- /dev/null
+++ b/Web/bfcache/frontend/src/vite-env.d.ts
@@ -0,0 +1 @@
+/// <reference types="vite/client" />
diff --git a/Web/WebSocket/websocket/frontend/tsconfig.json b/Web/bfcache/frontend/tsconfig.json
similarity index 90%
rename from Web/WebSocket/websocket/frontend/tsconfig.json
rename to Web/bfcache/frontend/tsconfig.json
index 1a3882d..4f5edc2 100644
--- a/Web/WebSocket/websocket/frontend/tsconfig.json
+++ b/Web/bfcache/frontend/tsconfig.json
@@ -4,7 +4,6 @@
     "useDefineForClassFields": true,
     "module": "ESNext",
     "lib": ["ES2022", "DOM", "DOM.Iterable"],
-    "types": ["vite/client"],
     "skipLibCheck": true,
 
     /* Bundler mode */
@@ -18,7 +17,7 @@
     "strict": true,
     "noUnusedLocals": true,
     "noUnusedParameters": true,
-    "erasableSyntaxOnly": false,
+    "erasableSyntaxOnly": true,
     "noFallthroughCasesInSwitch": true,
     "noUncheckedSideEffectImports": true
   },
diff --git a/Web/bfcache/server/.vscode/settings.json b/Web/bfcache/server/.vscode/settings.json
new file mode 100644
index 0000000..7852c0d
--- /dev/null
+++ b/Web/bfcache/server/.vscode/settings.json
@@ -0,0 +1,3 @@
+{
+    "idf.pythonInstallPath": "/opt/homebrew/bin/python3"
+}
\ No newline at end of file
diff --git a/Web/bfcache/server/src/index.ts b/Web/bfcache/server/src/index.ts
index 68e55dd..3cf7487 100644
--- a/Web/bfcache/server/src/index.ts
+++ b/Web/bfcache/server/src/index.ts
@@ -1,5 +1,6 @@
 import {LoggerFactory} from '@techniker-me/logger';
 import WebSocketServerFactory from './net/websockets/WebSocketServerFactory';
+import type { WebSocketHandler } from 'bun';
 
 LoggerFactory.setLoggingLevel('All');
 
@@ -15,7 +16,7 @@ const server = Bun.serve({
 
     return new Response('hi');
   },
-  websocket: webSocketRelayServer
+  websocket: webSocketRelayServer as WebSocketHandler<undefined>
 });
 
 process.on('SIGINT', () => {
diff --git a/Web/bfcache/server/src/net/websockets/WebSocketServer.ts b/Web/bfcache/server/src/net/websockets/WebSocketServer.ts
index 2467591..6fb29cc 100644
--- a/Web/bfcache/server/src/net/websockets/WebSocketServer.ts
+++ b/Web/bfcache/server/src/net/websockets/WebSocketServer.ts
@@ -95,4 +95,102 @@ export default class WebSocketServer {
   get perMessageDeflate(): PerMessageDeflate {
     return this._perMessageDeflate;
   }
+
+  public start(connectDelegate: (req, websocket, headers) => void, requestDelegate: (req, websocket, headers) => void, disconnectDelegate: (req, websocket, headers) => void, pongDelegate: (req, websocket, headers) => void) {
+    if (this._server) {
+      throw new Error('Can only start server once');
+    }
+
+    assert.assertFunction('connectDelegate', connectDelegate);
+    assert.assertFunction('requestDelegate', requestDelegate);
+    assert.assertFunction('disconnectDelegate', disconnectDelegate);
+    assert.assertFunction('pongDelegate', pongDelegate);
+
+    const serverOptions = _.cloneDeep(this._parameters);
+
+    log.info('Websocket server listening on port [%s] bound to [%s]', this._httpServer.address().port, _.get(serverOptions, ['path']));
+
+    serverOptions.noServer = true;
+
+    this._server = new ws.Server(serverOptions);
+    this._extensions = new WebsocketExtensions();
+    this._extensions.add(deflate);
+
+    // TODO Prevent upgrade request from being handled by this WS server if it's not within the configured path
+    this._server._server = this._httpServer;
+    this._httpServer.on('listening', this._server.emit.bind(this._server, 'listening'));
+    this._httpServer.on('error', this._server.emit.bind(this._server, 'error'));
+    this._httpServer.on('upgrade', (req, socket, head) => {
+      if (!_.startsWith(req.url, serverOptions.path)) {
+        return;
+      }
+
+      this._server.handleUpgrade(req, socket, head, ws => {
+        this._server.emit('connection', ws, req);
+      });
+    });
+
+    this._server.on('error', e => {
+      log.error('An error occurred on websocket', e);
+    });
+
+    this._server.on('connection', (connection, req) => {
+      let closed = false;
+
+      try {
+        connection.id = randomstring.generate(connectionIdLength);
+        connection.remoteAddress = getRemoteAddress.call(this, connection, req);
+
+        log.debug('[%s] connected from [%s] with headers [%j]', connection.id, connection.remoteAddress, req.headers);
+
+        connection.isOpen = () => connection.readyState === ws.OPEN;
+
+        connection.isClosed = () => connection.readyState === ws.CLOSED;
+
+        connection.on('error', e => {
+          log.error('An error occurred on websocket', e);
+        });
+
+        connection.on('message', message => {
+          try {
+            requestDelegate(connection, message);
+          } catch (e) {
+            log.error('Request handler failed for message [%s]', message, e);
+          }
+        });
+
+        connection.on('close', (reasonCode, description) => {
+          if (closed) {
+            log.warn('[%s] Multiple close events [%s] [%s] [%s]', connection.id, connection.remoteAddress, reasonCode, description);
+
+            return;
+          }
+
+          closed = true;
+
+          try {
+            disconnectDelegate(connection, reasonCode, description);
+          } catch (e) {
+            log.error('Disconnect handler failed', e);
+          }
+        });
+
+        connection.on('pong', message => {
+          try {
+            pongDelegate(connection, message);
+          } catch (e) {
+            log.error('Pong handler failed', e);
+          }
+        });
+
+        return connectDelegate(connection, _.get(req, ['headers']));
+      } catch (e) {
+        log.error('Accept/connect handler failed', e);
+      }
+    }
+    );
+
+    return this;
+  }
+}
 }
diff --git a/Web/bfcache/server/src/net/websockets/WebSocketServerFactory.ts b/Web/bfcache/server/src/net/websockets/WebSocketServerFactory.ts
index 3b45d06..7fb902c 100644
--- a/Web/bfcache/server/src/net/websockets/WebSocketServerFactory.ts
+++ b/Web/bfcache/server/src/net/websockets/WebSocketServerFactory.ts
@@ -9,11 +9,13 @@ export default class WebSocketServerFactory {
     const webSocketRelayServerOptions: WebSocketServerOptions = {
       onSocketError: (client, error) => logger.error(`Error: [%o] [${error.message}]`, client),
       onSocketOpen: client => {
+        console.log('New WebSocketClient [%o]', client);
         logger.debug('New WebSocketClient [%o]', client);
 
         clients.add(client);
       },
       onSocketMessage: (fromClient, message) => {
+        console.log('Relaying message [%o]', message);
         logger.debug(`Relaying message [%o]`, message);
 
         for (const client of clients) {
@@ -24,7 +26,10 @@ export default class WebSocketServerFactory {
           client.send(message);
         }
       },
-      onSocketClose: client => clients.delete(client),
+      onSocketClose: client => {
+        console.log('Client closed [%o]', client);
+        clients.delete(client);
+      },
       onSocketDrain: client => logger.debug('Client drain [%o]', client),
       publishToSelf: false
     };