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.

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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.

fwiw Ansible uses Jinja under the hood, which itself is a templating engine.