I hope I can help by asking that you review codeberg.org. Here's the website: https://codeberg.org/
I tested the website and my repo on it and it works without any issues using LibreJS. It specifies the different licences when making a new repo, including the different versions of the GNU GPL. I'm unsure as to whether they say GNU/Linux, or Linux as it doesn't seem to be discussed on any of their websites. You can check out it's terms of use here: https://codeberg.org/codeberg/org/src/branch/master/TermsOfUse.md There doesn't seem to be any odious conditions. It appears that they use the neutral term "Free and Open Source Software" in their mission statement: https://blog.codeberg.org/codebergorg-launched.html They use https for all their websites. I hope this helps with discussing the criteria for this repo hosting website.