[cascandaliato]

> I can't remember the name of the software but it begins with R

Renovate maybe? https://www.mend.io/free-developer-tools/renovate/

I use it for my home server and I love it because it takes care of Dockerfiles too and version changes are saved in git, which means that a rollback is just a matter of switching back to a previous commit and rebuilding your containers (in addition to restoring a backup of your Docker volumes).