UPDATE 14.02.2026: The image from containerrr is very outdated by now. There’s a fork that actually get’s updated. The post has been updated for that. New image: Here is my docker-compose file for the watchtower container. It auto-updates other containers on the host, including itself (but that often fails for some reason). It uses a pre-configured GMail-adress to send notification mails. The WATCHTOWER_SCHEDULE env variable lets watchtower check for updates every day at 03:15.Set the hostname to have a readable hostname in e-mail notifications.