I'm currently writing my notes in markdown files and publishing them on notes.davidmyno.rs in the spirit of 'learning in public'.
My first encounter with this idea was Nikita Voloboev's personal wiki, and I've come across a few others since then. Gwern.net is a particularly impressive example! Although I initially planned on using 'wiki' in the url, I opted for 'notes' to emphasise that the information is likely to be incomplete (and quite possibly incorrect!) in many places. Who knows, maybe this will change in the future.
To understand the build process, you're welcome to have a look at the markdown, the go program that produces the website, and the build manifest which triggers the website to build in CI when I publish changes.