I bought an old Lenovo hotel front desk computer I was going to turn into a router, but it didn’t have a pcie slot. So after I got the right computer and turning that into my router, I used that wrong computer as my nextcloud host (Debian, docker, AIO Nextcloud). It works well enough for people seeing my availability, family calendar, file server front end, and CardDAV. I don’t think it of be able to handle video/audio calls because of the hardware though.

Nextcloud does almost everything you want. Be aware though that is is pretty dang fragile. You can export calendars and have both public and private web access for calendars.

I have an instance running, but haven’t had a ton of time to dedicate on getting it the way I need it. I need a calendar that is accessible anonymously via the web for people to know my availability. File server, CalDAV, and CardDAV I was able to get separate solutions for.

The nextcloud AIO instance that hadn’t been working since September suddenly started working after I updated it. This was all after their forums did fuck all to help except tell me to get gud. I knew the problem wasn’t on me or my config and I feel so vindicated