If you want to write markdown and use something really simple, I feel it's appropriate to mention Markblog[0], a blogging engine I wrote a while back.

I've also written a short guide where I combine it with Github Pages for free hosting and Github Actions for automated CI[1].

[0]: https://github.com/olaven/markblog [1]: https://olaven.org/out/guides/blog_with_git_and_markdown.htm...