Well there more than one solution, if you want it. First of all, podman actually works fine with docker compose files. There may be some adjustments needed in other places, because despite the claim of being "a drop in docker replacement", it just isn't (quite). So assuming you install docker compose (not docker), you can just "docker-compose up" (note the dash) and it should work. Should.

Your can also just spin up a VM and install docker with compose in there, just for testing and/or running immich.