https://osgameclones.com/ is the best aggregate for this kind of thing.
https://libregamewiki.org/ also looks like something relevant.

Maybe now that we have a messy thread of various links, we can go check whether some of them are not yet listed in osgameclones.

YUNOHost iso is basically just Debian, but the one-click-install for various self-hosted things is it’s primary purpose. All done through web interface.