Upstream issue: https://gitlab.com/redhat/rhel-primitives/containers/-/issues/2

We're doing a plain "dnf --installroot" into a target root without even /dev and /proc mounted. This is a very unfriendly thing to do for code being run in this environment. One can easily end up with weird stuff if e.g. some script blindly does foo >/dev/null and you end up with a regular file there.

This should be fixed before releasing the MVP.  I gave a stab at it but ran out of time.