This repository is for developers who use Ubuntu as a base OS and add in other frameworks and DBs to build applications.
Instead of having one image with all the applications/frameworks, the intention is to have a separate systems with own purposes. For example, Ubuntu 12.04.2 with MongoDB 3.0 image. As more images are added in, we can pull necessary components of the application and let them run in their own containers.
Hope it will be useful for you.