Add gh packages build workflow

[khaosdoctor]

Adds the workflow files to enable CI

Checklist

• Commits are signed with Developer Certificate of Origin (DCO)

Fixes #34

[khaosdoctor]

Notes on why using docker action version 1.1.1 instead of v2:

This is because the v2 splitted the jobs into three parts, now instead of using a single action, we'd have to use three actions, one for login, then another one for buildx and another one for qemu. It has become more robust and configurable, but for our use case it's too much.

And besides, it has removed the tag_with_ref and tag_with_sha options, so we'd need to use other actions (or get those values manually).

[arschles]

@khaosdoctor can you change the helm charts as well?

[arschles]

A few comments. Also, can you release a :latest image in build_release.yml, in addition to the git SHA releases?

[arschles]

One comment. Also, just reiterating, can you change the default docker images in the helm chart too?

[arschles]

A few more comments, then I think this looks good.

[arschles]

Relevant links to set things up:

• access
• pushing and pulling

[arschles]

@khaosdoctor thanks for making all the changes. I'm going to wait until I can get access to set up the container registry and required secrets from @tomkerkhove

[tomkerkhove]

I've created the secrets, but require a little change; sorry!

• PACKAGES_USERNAME --> GHCR_AUTH_USER
• PACKAGES_PASSWORD --> GHCR_AUTH_PAT

[tomkerkhove]

I've created the secrets, but require a little change; sorry!

• PACKAGES_USERNAME --> GHCR_AUTH_USER
• PACKAGES_PASSWORD --> GHCR_AUTH_PAT

We would need to change this @khaosdoctor

[khaosdoctor]

Sorry I didn't see this comment!

[khaosdoctor]

@tomkerkhove done