[Bug 1084232] Docker fails to pull images from behind a proxy server

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1084232

--- Comment #2 from Darryl Bond  ---
Most references to docker and proxies found on google do not explicitly say
where the HTTP_PROXY should be set.
My suggestion is to add an EnvironmentFile to the systemd service file as part
of the package. It is strange that it is missing as most similar daemons have
one.