Set hostname on podman/docker run command line

[larsks]

The container hostname is embedded in the generated API certificate. Using
a known hostname (like "microshift") allows the developer to expose the API
at different addresses without invalidating the certificate by placing an
appropriate entry in /etc/hosts or equivalent.

[sallyom]

@larsks I can see this as a "how-to" instead, where you'd include adding the entry in /etc/hosts, a bit about why (valid certificates) and a typical use-case for doing this. It would be a file here: https://github.com/redhat-et/microshift-documentation/tree/main/content/en/docs/user-documentation/how-tos
@fzdarsky wdyt?

[larsks]

@sallyom Why not just include this as part of the default instructions? It's not as if it substantially changes the complexity of the existing command line, and it means the generated certificate is immediately more useful. I'm not sure I understand the argument against making the change.