So I just started playing with docker today at lunch and have to say I am super impressed with it. I'm excited to play around with it and learn more. I am pla

So I just started playing with docker today at lunch and have to say I am super impressed with it. I'm excited to play around with it and learn more. I am planning on using it help manage many versions and configurations of a certain daemon to test my application against. Do Dockerfiles has any sense of inheritance? I am trying to think of the easiest and most maintainable way to set this up. Should I create a base image of a working install for each version I want to test with and then have a Dockerfile to make the configurations changes for each test case? It seems like I would get into the place where I would have a Dockerfile for a test case and then I'd have to make copies of it for each version and change the "from" line.