[FinalDestiny]

It looks like they're loading in MDX (Markdown) for a lot of the pages

There are quite a few "static-site generator" templates that are easy to setup and customize and many of them are free to use! If I had to guess, I think they're using VitePress [1] here. Nextra [2] is also good for this kind of a website.

[1] https://vitepress.vuejs.org/

[2] https://nextra.site/

[ericmsimons]

Eric (StackBlitz CEO) here- just wanted to confirm that we are indeed using VitePress! By far the best documentation site generator available right now from a DX, design, and flexibility perspective. Highly recommend.