Merge together several repositories

[Echolon]

Hello,

I would like to suggest to merge together the maintenance of "rather small" repositories.

I think it helps to have a better overview and issues or task can be labeled accordingly to differ.

Of course, I may miss any specific technical reasons.

For example:
https://github.com/xsf/mediawiki-docker
https://github.com/xsf/registry-docker-base