Dockerfile-build.sh: remove DNF cache at the end of the build
This saves over 100MB from the resulting image size.
This change is included in the new image at https://hub.docker.com/r/buildstream/buildstream-fedora/tags/
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
This saves over 100MB from the resulting image size.
This change is included in the new image at https://hub.docker.com/r/buildstream/buildstream-fedora/tags/