I noticed that https://we.phorge.it/ has not a footer with a default license, and this is a problem since as default the contents are technically "all rights reserved by respective authors", and so it means that collaboration is not legally enabled.

Proposed footer:

Public contents are in Creative Commons Attribution-ShareAlike 4.0 (CC-BY-SA) unless otherwise noted.

Assuming the same license of Wikipedia and StackOverflow seems reasonable and implicit.

How to

An Administrator is needed to go here:

https://we.phorge.it/config/edit/ui.footer-items/

And set this:

[
  {
    "name": "Public contents are in Creative Commons Attribution-ShareAlike 4.0 (CC-BY-SA) and Apache 2.0 unless otherwise noted."
  }
]