Docker Compose

version: '3.8'
services:
  app:
    build: .
    ports: ["3000:3000"]
    environment:
      - DATABASE_URL=postgresql://user:pass@db:5432/myapp
      - REDIS_URL=redis://cache:6379
    depends_on:
      db: { condition: service_healthy }
      cache: { condition: service_started }
    volumes:
      - ./src:/app/src  # dev: hot-reload

  db:
    image: postgres:16-alpine
    environment:
      POSTGRES_USER: user
      POSTGRES_PASSWORD: pass
      POSTGRES_DB: myapp
    ports: ["5432:5432"]
    volumes: [pgdata:/var/lib/postgresql/data]
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U user -d myapp"]
      interval: 5s
      retries: 5

  cache:
    image: redis:7-alpine
    ports: ["6379:6379"]
    volumes: [redisdata:/data]

volumes:
  pgdata:
  redisdata: