Proposal: Initial images proposal

This is a proposal to add a higher level image component that can keep track of Docker image repositories, images, and image metadata.
> it can be convenient to preserve them in a persisted entity.
This could be "preserved" in the config files for your pod. Maybe the MySQL example could be updated to reflect how someone could do that today, i.e: "Maintain a pod configuration that match image ENV metadata", instead of suggesting to build another image.

> how do you get an initial pod template and populate those environment variables?
The images metadata already gives you information about which environment variables are exposed. But it's true that there is no marker that indicate which ones are useful to be overridden by the user.