start registry container

[nabuskey]

Fixes the issue with the test on git image where you get a error message like this

--- FAIL: TestReconcileGitServerImage (19.02s)
    image_test.go:44: reconcile error: Error response from daemon: Get "http://localhost:5001/v2/": dial tcp [::1]:5001: connect: connection refused
    image_test.go:48: Invalid or no Image ID in status: ""
    image_test.go:59: Removing docker image: Error response from daemon: invalid reference format
FAIL

It starts a registry container so it can get the digest. Definitely not the best way to go about testing these but we shouldn't need the code tested going forward.

[nimakaviani]

Nice!

I saw this failure when I was testing the fix for creating the kind network. lets get it over the line and get to green before cutting the first release

[nabuskey]

Closing this because build issues are closely related to #67

Will handle both in that PR