Modify CI Pipeline - Spin up GitLab container to be used with CustomersDot

Background

CustomersDot images are built and published. They are able to be pulled and run locally using Docker.

Problem

CustomersDot is designed to interoperate with GitLab. This container can be configured with a local GDK instance, but it would be best if a pre-configured GitLab container were able to be run in CI.

Proposal

Provide the ability to run both CustomersDot <-> GitLab Docker containers configured to work seamlessly with one another, and have the ability to run these both locally and in CI.