PostmarketOS has piqued my interest as the most promising Linux phone OS. I would give it a try if you can put up with an immature system, at least when compared to Android.

There is an official image in the main repo, https://github.com/Kozea/Radicale, ghcr.io/kozea/radicale.

Yeah I agree.

I moved my stack from podman run to quadlets, but god damn was it frustrating to deal with them. I kept running into weird issues such as: the containers not starting every time on reboot, all containers taking like two minutes to start even without needing to download the image, the unit files not being found by systemd.

I ended up moving back to podman run, because they just worked. It is a shame, to be honest, because I would like to use quadlets.