Docker Compose - Node + Postgres + Redis

version: '3.9'

services:
  api:
    build:
      context: .
      dockerfile: Dockerfile
    ports:
      - '3000:3000'
    environment:
      NODE_ENV: production
      DATABASE_URL: postgres://postgres:secret@db:5432/app
      REDIS_URL: redis://cache:6379
    depends_on:
      db:
        condition: service_healthy
      cache:
        condition: service_started
    restart: unless-stopped

  db:
    image: postgres:16-alpine
    environment:
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: secret
      POSTGRES_DB: app
    volumes:
      - pg_data:/var/lib/postgresql/data
    healthcheck:
      test: ['CMD-SHELL', 'pg_isready -U postgres']
      interval: 5s
      timeout: 5s
      retries: 5

  cache:
    image: redis:7-alpine
    volumes:
      - redis_data:/data
    command: redis-server --appendonly yes

volumes:
  pg_data:
  redis_data: