Allow forks to publish docker images

[4n4n4s]

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[vogler]

Thanks a lot!
As I understand, this PR now allows forks to publish their own image if logins are set.
What's the planned behavior? Images for PRs here aren't built. I guess they should be built but just not pushed.
I also had some comment there that pull_request only triggered on creation, not on every push, but not sure if that's true.

[vogler]

(Also, probably best to avoid force-pushing since it may screw up reviews etc.)

[4n4n4s]

Thanks a lot!

As I understand, this PR now allows forks to publish their own image if logins are set.

Correct

What's the planned behavior? Images for PRs here aren't built. I guess they should be built but just not pushed.

I introduced it so that on forks you can also have your image and then test it quickly without requiring the merge here to have it somewhere easily accessible. Could be quite helpful for future store and quick/bugfixes.

I also had some comment there that pull_request only triggered on creation, not on every push, but not sure if that's true.

https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#pull_request according to this it also triggers on "edited".

[vogler]

Made some changes, probably some more adjustments are needed to get the desired behavior.