Radicale is the simplest CalDAV/CardDAV server I've ever set up

Ive experimented with it over the last couple weeks but it ended up not being what I was looking for.

The use case for me was making my sonarr calendar public while keeping sonarr itself private. It would have been nice to point radicale to my local address for sonarr to fetch calendar updates then make them publicly accessible but that didn't seem (easily) possible.

What I ended up doing instead was running a cron script to wget the sonarr calendar and place it in my caddy directory.