[Docs] Add section for getting various pieces of container info

[pdevito3]

As I mentioned in #196, figuring out how to get much of the info on container is hard. Something else I just realized I can't find is the Created date for a container.

Documenting something like getting the host port from #196, a created date like above, and general config info would be a great addition to the docs.

[mariotoffia]

I will update the non existant configuration on the model element container.cs, thanks for reporting this!

I've also added the System.DateTime Created on the Container element so it is now reachable.

Cheers,
Mario :)