It's just a markdown file converted to html and served from a Fastmail folder.
My process was:
Read this thread [2] yesterday afternoon. Thought this sounded like a "looser" work environment. Searched "synonym loose". 3rd result was "unaffixed". Bought unaffixed.com and pointed it at Fastmail. MD to html with pandoc. Added water.css stylesheet last night. Thought up some ideas on making it better.
[1]: https://sahillavingia.com/work [2]: https://news.ycombinator.com/item?id=25686678