Use artifacts for docker images

[EmilyBourne]

Use artifacts for docker images to ensure forks can contribute.

[jbigot]

perfect, thanks !

[tpadioleau]

Shall it be merged ?

[jbigot]

Shall it be merged ?

not as it is, it will make tests that didn't fail before break because of space issue. As mentioned earlier, I believe this is a nice addition, but it should be used as a fallback only when pushing from a fork:

I don't see a good solution that will work all the time.

My proposition is to introduce a condition in the code to test from which repository the source branch is:

when on the original repository, use the initial solution using docker push,
when on a different directory, use the version with artifact.

That way, we shouldn't have random failure in case that already worked, but new cases when pulling from external repo might work (maybe after a few tries due to size limitations)

[jbigot]

Alrighty ! Thank you very much, @EmilyBourne !