- Hint: Tried to use the plattform parameter of the build-push-action,
however this failed with an error in the Jobs.
Therefore, I used a matrix with the platforms.
- The ARM build takes a long time.
Previously, only the immutable tags would get generated (i.e.
`5.1.2-1234`), but not the rolling tags (`5-apache`), due to a
limitation of the docker metadata action.
Thus, now we use manual regex matching instead.
See the linked issue for details.
Fixes https://github.com/martialblog/docker-limesurvey/issues/105