So when you say Caddy supports serving Markdown as HTML, is that normal, boring Markdown only, or does it implement CommonMark (or something else entirely)?

Also, do you have any plans to make Caddy support domain proxying (or whatever it's called) where you can specify that requests for certain sites should be proxied to a service running on another host + port combination (if it doesn't support that already)?

Definitely a cool project though. I'll keep an eye on it. Keep up the excellent work!