Use semantic versioning for dune-env Docker image tags
What does this MR do?
Change the tag version scheme of the
dune-env Docker image, independently from the actual DUNE version used.
Doing so does enable changes to the image which are not backwards compatible, but will not break other branches relying on older images.
Is there something that needs to be double checked?
Can this MR be accepted?
- Built and tagged new image
- Pipeline passing