services:
  watchtower:
    image: containrrr/watchtower
    container_name: watchtower
    restart: unless-stopped
    environment:
      WATCHTOWER_LABEL_ENABLE: "true"
      WATCHTOWER_SCHEDULE: "0 0 4 * * *"
      WATCHTOWER_CLEANUP: "true"
      WATCHTOWER_NOTIFICATIONS: email
      WATCHTOWER_NOTIFICATION_EMAIL_FROM: ${SMTP_FROM}
      WATCHTOWER_NOTIFICATION_EMAIL_TO: ${SMTP_TO}
      WATCHTOWER_NOTIFICATION_EMAIL_SERVER: smtp.gmail.com
      WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PORT: "587"
      WATCHTOWER_NOTIFICATION_EMAIL_SERVER_USER: ${SMTP_USER}
      WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PASSWORD: ${SMTP_PASSWORD}
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    logging:
      driver: json-file
      options:
        max-size: "10m"
        max-file: "3"