Similar to how it's done in https://docs.abapgit.org/:

Lars explained:

GitHub pages are built and published automatically when there is a push to master, see https://help.github.com/articles/configuring-a-publishing-source-for-github-pages/
And then GitHub also works with Jekyll, see https://help.github.com/articles/using-jekyll-as-a-static-site-generator-with-github-pages/
Its a lot of work to set up the first time, but after that it just works. You can also start out with simple html or markdown which will be published automatically.