Enable internal docker repo and make it default (for now)

[berndtj]

Bug Report

Current issues in building/kaniko cause issues when pushing to gcr.io. While kaniko/build stabilize use an internal repo. Internal repo is also better for testing and speed.

Expected behavior

Current behavior

Steps to reproduce

Impact

• [ ] Low - Annoyance, but does not impact business or functionality
• [ ] Medium - Issue can be worked around, but is causing pain
• [ ] High - Blocker

Possible solution

Your Environment

• Dispatch CLI version (or git commit):
• Dispatch Chart version (or image[s] tag):
• Operating System and version:
• Kubernetes version (and distribution):
• Etc (any other useful environmental information):