Add repo mirroring

[RothAndrew]

Add file /etc/rancher/k3s/registries.yaml to init package which will tell k3s to automatically use zarf.localhost as a registry mirror for various remote registries

[jeff-mccoy]

Thanks, still just had a question on http vs https for the mirror, did you test https and run into cert trust issues? I think it’s fine if that’s the case, can just roll that into #6.

[RothAndrew]

Thanks, still just had a question on http vs https for the mirror, did you test https and run into cert trust issues? I think it’s fine if that’s the case, can just roll that into #6.

I'll check, I think I just assumed it wouldn't work with https.

[RothAndrew]

Ran out of time today, but will definitely look at this tomorrow.

[jeff-mccoy]

Confirmed https works. Thinking about this a little more this actually makes sense because Zarf handles host-level trust of the Zarf ephemeral CA already, so containerd shouldn't get sad either. Going to merge this now, thanks!