I'm more familiar with kubernetes for running production-grade apps and that's what I went with. I run ubuntu's microk8s, and the volume management is in kubernetes-land which I understand well. Finally helmfiles deploys my Postgres and immich helm charts. Perhaps "overkill" to some, but it's tooling I'm very familiar with, and feel comfortable running in "production" for my personal server.

Worth noting that immich itself recommends not using immich for the single source of your images and videos from how active development it is, so I also run nextcloud + crunchydata's postgres also inside microk8s/kubernetes.