Add Debian repository (repo.nlb.no) to system

[bertfrees]

Install the reprepro-service either through Docker (but I've had some issues getting this to work on the Vagrant test VM) or using a Debian package (snaekobbi/reprepro-service#4).

[josteinaj]

The second (Debian) approach could presumably be installed with an ansible playbook?

[bertfrees]

Yes, both approaches can be used with Ansible. But with the first I've been having some trouble. (I think if I were to test it on a real machine it would work but I use the VBox machine to test.)

[bertfrees]

I'll push the method with Docker to a branch so you can see it.

[bertfrees]

@josteinaj See commit 82a76c7