On the other end of the spectrum you have tools like MkDocs (or mdbook, docsify, docusaurus, etc.) which are more focused on technical docs in markdown format. These tools put much less emphasis on schema, layout, taxonomy and really try to go from a pile of simple markdown files to a rendered site with as little friction as possible. You typically just lay out files in the filesystem, make simple markdown links between files, and the tool takes care of all the details of building a doc site like layout, rendering, linking, table of contents, and even search.
The big tradeoff between them is complexity. There's a _lot_ to learn to fully use something like hugo. You can spend days going through all of its features and building complex asset processing pipelines, themes, taxonomies, workflows, etc. But this is also a bit of a downside if you just want to turn some markdown files into simple technical docs--you have to do a bit of organization, add frontmatter, and learn a few hugo quirks. You'll have a fancy base to really go wild and add tons of content... but for technical docs you might not need all that power and complexity.
MkDocs strikes a really nice balance in this regard--you basically just write markdown files with simple links and it will figure out the rest. The Material theme here is _very_ slick and one of the best out of the box themes you'll find for any technical docs generator (or even SSG in general) period. This combo is so good Spotify use it heavily in their developer portal system Backstage: https://backstage.io/blog/2020/09/08/announcing-tech-docs That's a pretty strong endorsement IMHO.