chore: Copy signing keys to /etc/ only

[fiftydinar]

Supplements main PR: blue-build/modules#375

Tests & it works, can be merged.

[gmpinder]

The changes look good, but it seems like the signing module is causing failures. I think that will have to be updated before this can be merged in.

[fiftydinar]

The changes look good, but it seems like the signing module is causing failures. I think that will have to be updated before this can be merged in.

Edit: Ublue-os key shouldn't be copied as a replacement to the image key & that file doesn't exist anyway. Idk where it got from in that code.
I'll just error the build out if .pub key is not copied.

[fiftydinar]

It would be good to use the signing module from my PR temporarily to test this, then revert it back.
Is that good?

[fiftydinar]

It would be good to use the signing module from my PR temporarily to test this, then revert it back. Is that good?

I confirm it works now, so it can be merged.

[gmpinder]

It would be good to use the signing module from my PR temporarily to test this, then revert it back. Is that good?

I confirm it works now, so it can be merged.

I'm not comfortable merging this in until blue-build/modules#375 is merged. I run my builds of the main branch and this will fail them without the module changes.

[fiftydinar]

It would be good to use the signing module from my PR temporarily to test this, then revert it back. Is that good?

I confirm it works now, so it can be merged.

I'm not comfortable merging this in until blue-build/modules#375 is merged. I run my builds of the main branch and this will fail them without the module changes.

Merged