

Do not use /root inside or outside of a container for plain file access. That’s insane.
This is a permissions issue, so set the mount point to something else that’s world readable by default. Event /tmp isn’t a horrible idea.
You also don’t mention if Podman is the underlying runtime managing the container, but if it is, you need get familiar with mounting when things like SElinux are enabled on this host.
Anything that already exists and won’t have pwd permissions issues is fine. Generally whatever your direct user has access to, so you don’t have to add things to the base image.