This is a very good tutorial! Love the end-to-end examples. Great teaching method as it gives an overview of what you want to achieve without looking at things in isolation. Wanted to add one bit of info and give a heads up about the Docker for Mac & Windows beta at https://beta.docker.com/.

> If you are on Mac or Windows, consider using a Virtual Machine. I use Parallels on Mac OS X to run an Ubuntu machine for most development activities. Being able to take snapshots, break things and then revert back is very handy when experimenting.

The beta will make is super easy to use Docker on Mac & Windows without running a heavy Virtual Machine. Here's a little video about it @ https://blog.docker.com/2016/03/docker-for-mac-windows-beta/. Basically, it feels like running Docker natively, has upgrade features build it, so you can choose to always be on the latest release (super nice). I've been using it for a few months and it is awesome to just type "docker run" on my macbook and have it work seamlessly (vs using third party virtual machine software and env bits). The idea is that you can develop on Mac & Windows using the same images you will eventually deploy. It just works (although I'm biased).

Disclaimer: Work for Docker.