Provide a Dockerfile enabling mybinder hosting

[scientific-coder]

Thanks for this awesome software ! I'd live to be able to easily share notebooks by having them (freely) hosted on mybinder, as I do with BeakerX Notebooks. I think that it should be possible to provide a Dockerfile that would allow that but I just hacked something just from the one you are using based on the binder documentation without knowing anything about Docker.

So if you could find a way to provide a functional Dockerfile (maybe not even based on my broken proof of concept for mybinder hosting, I think it would lower the barrier to adoption tremendously (the live notebook being just one clic away !

Thx !