Find upstream tag and Create tag

[jburel]

This workflow is follow-up on #63 63
The workflow will run daily

• If a new tag is found in ome/omero-web
• A tag is created and pushed to this repository.
• Then changes implemented in Push to dockerhub #63 will create and push to dockerhub
  The 2 workflows should then prevent the fact that the docker images have not been updated since 5.11.0

cc @sbesson @will-moore

[joshmoore]

Each time we create new workflow, I check the docs to see if it's possible to centralize them. https://docs.github.com/en/actions/using-workflows/reusing-workflows#creating-a-reusable-workflow is still unclear in that I think it must be in the same repo. https://stackoverflow.com/a/71166720/56887 is an interesting idea though to download it.

[sbesson]

A few additional comments:

• is the Makefile executed in the new workflow? If not I assume the images will lack commits similar to 8bf3614. As mentioned in Investigate labels creation to GitHub workflows omero-server-docker#57, I suspect it might be possible to move this logic into the deployment action
• it looks like the new tag is never built before being pushed. This means potential failures should be handled via new tags?

[jburel]

• for the Makefile point, i will need to investigate the labels.
• For the tag step, we could add a step building the image before pushing.

[jburel]

Labels should be introduced in #63

[jburel]

After investigation this could be done fairly easily via a re-usable workflow