---

name: docker-setup description: Docker configuration and setup

Docker Setup

Dockerfile Best Practices

CopyFROM node:20-alpine
WORKDIR /app
COPY package*.json ./
RUN npm ci --only=production
COPY . .
EXPOSE 3000
CMD ["node", "server.js"]

Principles

• Use specific tags
• Multi-stage builds
• Minimize layers
• Don't run as root
• Use .dockerignore

Docker Compose

Copyservices:
  app:
    build: .
    ports:
      - "3000:3000"