One of the things that makes Docker so useful is how easy it is to pull ready-to-use images from a central location, Docker’s Central Registry. It is just as easy to push your own image (or collection of tagged images as a repository) to the same public registry so that everyone can benefit from your newly Dockerized service. But sometimes you can’t share your repository with the world because it contains proprietary code or confidential information. Today we are introducing an easy way to share repositories on your own registry so that you can control access to them and still share them among…