Nightly debian packages and other GitLab-CI/Docker improvements
This merge requests adds:
- Nightly Debian Stretch package builds
- Docker Containers built from the nightly packages on both Debian Stretch and EL7. The resulting containers will provide a better approximation of what an actual release will look like vs the previous
lalsuite:nightlycontainer that was constructed from the CI output.
- Building of packages and Docker containers, on both Debian Stretch and EL7, whenever a tag is pushed to the repository.
Note: The actual packages are currently not made available via a software repository, these will be provided at a later date.
@leo-singer, with your Debian Maintainer's hat on could you please look at the way the Debian packages are built and offer any comments or suggestions.