Push standalone images to Docker Hub as well
It would be nice for people in the US is the standalone images were also pushed to Docker Hub as in the cvmfs images (see here).
If you'd like, I can do a PR to change https://gitlab.cern.ch/cms-cloud/cmssw-docker/-/blob/master/.gitlab-ci.yml#L62-64 in order to do this. The one piece I don't know (still looking) is how to limit this to just the "latest" images as in the note on the cvmfs template.