Description of problem:
Documentation for OpenShift Local uses Alpine Linux[1] instead of Red Hat's Universal Base Image (UBI) in examples. It should refer how to use UBI, since they are signed and it's hard to usem them without proper documentation. It's not the case to just change the image to registry.access.redhat.com/ubi8/ubi. It will fail.

Version-Release number of selected component (if applicable):
Openshift Local 2.3

How reproducible:
100% (Documentation issue)

Steps to Reproduce:
1. Follow the OpenShift Local quick start guide.
2. $ podman pull quay.io/libpod/alpine
3. Cry

Actual results:
Using a container image that's not recommended and unsupported by Red Hat with incompatible ABI with RHEL.

Expected results:
Being able to use and be guided how to use a Red Hat's sponsored image.

Additional info:
[1] https://access.redhat.com/documentation/en-us/red_hat_openshift_local/2.3/html/getting_started_guide/using_gsg