services:
  postgresql17:
    image: postgres:18.4@sha256:29ee7bb30d804447dc9a91fd0d74322ae1dc3a4072cc6346f70a5ed6e783b565
    container_name: postgresql17
    restart: unless-stopped

    environment:
      TZ: Europe/Berlin
      POSTGRES_USER: mailarchiver
      POSTGRES_DB: mailarchiver
      POSTGRES_PASSWORD_FILE: /run/secrets/postgres_password
      PGDATA: /var/lib/postgresql/18/docker

    volumes:
      - /mnt/user/appdata/postgresql18:/var/lib/postgresql
      - /mnt/user/appdata/secrets/postgres_password.txt:/run/secrets/postgres_password:ro

    networks:
      - backend_net

    security_opt:
      - no-new-privileges:true

    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U mailarchiver -d mailarchiver"]
      interval: 30s
      timeout: 5s
      retries: 5
      start_period: 30s

networks:
  backend_net:
    external: true