Node Code Sandbox MCP

# ─── Builder stage ────────────────────────────────────────────────────────── FROM node:23-slim AS builder WORKDIR /app # 1. Copy package files and tsconfig to install devDependencies (including tsc) COPY package*.json tsconfig.json tsconfig.build.json ./ RUN npm install # 2. Copy all source (including src/tools/initialize.ts) and compile COPY src ./src RUN npm run build # emits dist/server.js, dist/tools/initialize.js, etc. # ─── Runtime stage ────────────────────────────────────────────────────────── FROM node:23-slim WORKDIR /app # 3. Install Docker CLI so we can shell out to docker commands RUN apt-get update && \ apt-get install -y --no-install-recommends docker.io && \ rm -rf /var/lib/apt/lists/* # 4. Copy only package files & install production deps COPY package*.json ./ RUN npm pkg delete scripts.prepare && npm install --production # 5. Pull in the compiled output from builder COPY --from=builder /app/dist ./dist # 6. Expose Docker socket for nested Docker commands # When running: docker run -v /var/run/docker.sock:/var/run/docker.sock ... VOLUME ["/var/run/docker.sock"] # 7. Start your server CMD ["node", "dist/server.js"]