I just spinned up the docker compose bare bone without any modification just to see if it actually works on localhost. Just a checkup to see if by default it works, and yes I can login from my host IP:PORT
without any issues.
https://github.com/mediacms-io/mediacms/blob/main/docs/admins_docs.md#installation
I just changed the default port, because 80
is already used and gave the admin account a password.
Maybe this github anwser can be helpful ??
The compose stack seems not that easy to customize, In your position I would mount it bare bone a change things one/one reading through their admin docs !
My guess would be that changing the volume a few things are missing? I don't know, docker issues a hard to troubleshoot when you're not infront of the computer.