Looking for a simple card/cal/WebDAV server that runs in docker.
Have tried Davis, Radicale and Baikal but have either struggled to get them working or found them a bitch to maintain.
Doesn’t have to be a DAV type solution. Syncing/backing up contacts and calendars from an android phone is essential.
Maybe try to explain the struggles you have had, since to my knowledge the posted options are the best and simplest once out there.