Contribution guidelines point to missing wiki page

[clayreimann]

The contribution gudelines point to the wiki. Which has either been disabled, or was never enabled in the first place. If this content exists in the wiki, it would be helpful if an admin can retrieve it.

[slawekjaranowski]

Thanks for pointing this.

I rather would move it to .github repo with content fix.

Such file should contains general information and pointing for more details to https://www.mojohaus.org/

https://docs.github.com/en/communities/setting-up-your-project-for-healthy-contributions/creating-a-default-community-health-file

[slawekjaranowski]

For reference: mojohaus/mojohaus.github.io#64