Just added a MediaWiki 1.43.0 wiki to the site. Integrated it the same way as the Moodle LMS. I installed MediaWiki in a subdomain and link to it via a Help link in the main menu.
There’s no content, and I may not add any. The purpose is to demonstrate one way to integrate a robust multi-contributor user assistance platform into a web site. Of course, access to the site and any/all linked web apps could be restricted to certain audiences via various mechanisms including single sign on, email domain restrictions, and DNS provider tools.
As with my LMS, I’ve locked down the Wiki so only I can actually log in and make updates. In other words, no guest accounts.