Add Dockerfile for multi-stage build setup

server/Dockerfile

@@ -0,0 +1,19 @@
+FROM oven/bun:latest AS builder
+
+WORKDIR /app
+
+COPY package.json .
+
+RUN bun install
+
+COPY . .
+
+RUN bun run ci-build:dist
+
+FROM oven/bun:latest AS runner
+
+WORKDIR /app
+
+COPY --from=builder /app/dist .
+
+CMD ["bun", "run", "src/index.ts"]