Do you have a link to the year-old info for context? I’m curious why people would be interested in federation of a DVCS like Gitea et al?

Not that I’m aware of, but the source Markdown files are here, so you could probably make one with e.g. pandoc if you wanted.

Echoing the sentiment that you should adjust your perspective in approaching containerization, otherwise you’re in for a tough time.

Jerome Petazzoni, one of the more recognizable names in the container community, has a site where he puts all of his workshops, slides, etc. This is his one for getting started with Docker.