Permanently enable additional YUM repositories

[pike (Michael Kicks)]

@giacomo

Still there are some scenarios where is hard to give support, like when running docker on a machine which is also acting as a gateway for the network.

Which makes sense in some situations, avoiding routing problems.
I’m asking you if possible to have some best practices about docker into a “server only” machine and correlation between gateway.
Maybe could ease a lot of loopholes…