services:
  watchtower:
    image: nickfedor/watchtower:latest  # containrrr/watchtower is archived upstream (2026-10-26)
    container_name: watchtower
    restart: unless-stopped
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock:ro
    environment:
      - WATCHTOWER_CLEANUP=true
      - WATCHTOWER_INCLUDE_RESTARTING=true
      - WATCHTOWER_SCHEDULE=0 0 4,16 * * *  # twice daily, 04:00 + 16:00 local
      - WATCHTOWER_MONITOR_ONLY=false
      - TZ=America/Chicago
      - DOCKER_API_VERSION=1.44
    mem_limit: 256M
    logging:
      driver: "json-file"
      options:
        max-size: "50m"
        max-file: "3"