Include registry container with images.tar.gz

Feature Request

Include a registry container with images.tar.gz to assist with synker

Why

registry:2 may not exist in full airgap environments, packaging the registry will assist with using synker in airgap environments.

Proposed Solution

Add docker save -o /var/lib/registry/registry.tar registry:2 to ./.gitlab-ci.yaml package stage but registry.dso.mil/platform-one/big-bang/bigbang/synker:0.0.1 does not have docker. Update synker to include registry:2?

Or save registry.tar as an artifact somewhere for it to get pulled in during package stage