services:
  postgres:
    image: postgres:17-alpine
    container_name: sqldemo-postgres
    environment:
      POSTGRES_DB: warehouse
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: postgres
    ports:
      - "5432:5432"
    volumes:
      # Files here run once, on first boot of an empty data volume.
      - ./init:/docker-entrypoint-initdb.d:ro
      - pgdata:/var/lib/postgresql/data
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U postgres -d warehouse"]
      interval: 3s
      timeout: 3s
      retries: 20

volumes:
  pgdata: