First, we're still in a situation where bib doesn't work with c9s.
Let's link to the existing docs for using `bootc install to-disk`
which *does* work (and fixes multiple other bugs at the same time too).
Second: Let's document using systemd credentials to inject a root
SSH key, because this works across every image we ship where
one can inject SMBIOS bits. (But notably this doesn't work in
most production IaaS virt systems like KubeVirt, AWS etc. which
gets into cloud agents).
dabf837e32