This is my preferred option as well. Both GitLab and GitHub turn your markdown (and some other formats) files into static pages. They both have web-based editin

This is my preferred option as well. Both GitLab and GitHub turn your markdown (and some other formats) files into static pages. They both have web-based editing support, so it is not necessary for a user to know anything about git to contribute. Both can automatically generate a table of contents for a page. And it gives you better versioning than any wiki system.