services:
  postgres:
    image: postgres:17-alpine
    volumes:
      - pgdata:/var/lib/postgresql/data
    ports:
      - 5432:5432
    restart: always
    expose:
      - 5432
    environment:
      POSTGRES_USER: ${POSTGRES_USER:-username}
      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-password}
volumes:
  pgdata: