Low hanging fruit: documentation improvements


Here is a list of of low hanging fruit that a developer could pick as a first contribution to the Gitea codebase. They would normally be in the Gitea issue tracker but I deleted my GitHub account a few years ago and cannot do that myself.

If someone converts one of the following into an issue or a pull request, please remove it from the list (this post is a wiki). Or just add a comment and I’ll do it :wink: