Docker Cloud provides a hosted registry service where you can create repositories to store your Docker images. You can choose to push images to the repositories, or link to your source code and build them directly in Docker Cloud.
You can build images manually, or set up automated builds to rebuild your Docker
image on each
git push to the source code. You can also create automated
tests, and when the tests pass use autoredeploy to automatically update your
running services when a build passes its tests.