That's very very nice of you, really.
But that won't solve the issue. With all due respect, what will happen when the server goes down for whatever reason, and you are unreachable/on vacation/not there anymore because you lost interest or because life threw some nasty things at your face?
Open source is like that, people come and leave, so you can't really rely on people for things that should not change.
For your information @david_bernard_31 is working on a way to host the wiki on github.
Not really as a github wiki, but as a generated gh_pages site from the wiki sources.
People could contribute it by making PRs, and there is a new system in github to edit files online and automatically submit a PR from your edit.