Maybe it's changed in the last month or two, but last time I looked at GitHub actions I couldn't find a single example of "Build docker container and push to Gi

Maybe it's changed in the last month or two, but last time I looked at GitHub actions I couldn't find a single example of "Build docker container and push to GitHub Packages". There are a lot of cool examples demo'ing some nifty stuff, but I'd like to see a lot of very basic examples first. The sort of thing anyone could/would copy into their project and use, then later learn how to make it fancy.