Any MDN Docs type website builders/templates out there?

I want to create a tutorial for the languages that I know, and I'd like to start with HTML. The problem is my spoken language isn't very well known and I'd like to build a tutorial in it, however I don't want to have to build a massive website for it, I'd like an editor so I can always add things in. An example is MDN web docs, it has links you can open that show a menu on the left side, and then you click on a topic and there's a page for the tutorial for that particular topic. Is there a website builder that does this? I can only seem to find the ones that do commercial websites for businesses and that will not do as you can surely imagine. Here is an example: https://developer.mozilla.org/en-US/docs/Learn/Getting_started_with_the_web/HTML_basics

As you can see I'm looking for that sort of function