Stopped working for me with a recent docker cli update. That's how I even found out it's totally abandoned.

I'm not a big fan of running software that has access to the internet once it's abandoned like this.

Not for the latest and future versions of Docker.

This fork works, though: https://github.com/nicholas-fedor/watchtower

I used to use it and switched away because it's not maintained and I had errors with recent docker cli