watchtower

watchtower:
    image: containrrr/watchtower
    container_name: watchtower
    environment:
     - WATCHTOWER_NOTIFICATIONS=email
     - WATCHTOWER_NOTIFICATION_EMAIL_FROM=sender@example.com
     - WATCHTOWER_NOTIFICATION_EMAIL_TO=empfaenger@example.com
     - WATCHTOWER_NOTIFICATION_EMAIL_SERVER=smtp.host.com
     - WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PORT=587
     - WATCHTOWER_NOTIFICATION_EMAIL_SERVER_USER=sender@example.com
     - WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PASSWORD=password
     - WATCHTOWER_NOTIFICATION_EMAIL_DELAY=2
    restart: unless-stopped
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
      - /root/.docker/config.json:/config.json
    command: --interval 604800 --cleanup
    logging:
      driver: "json-file"
      options:
        max-size: "5m"