add docker container

[shmargum]

This avoids some hassle of installing dependencies.

I had success deploying and updating the lambda to aws with this container.

[kdybicz]

heh, so to avoid hassle of installing dependencies you're proposing hassle of installing Docker? :D I get your point, though it would be nice to move description further down and present as an alternative approach, plus it would be nice to add some use case examples for people less experienced with Docker. What do you think?