If you'd like a taste of Docker, here's how to get my silly Taco app running under Docker on your machine.
... using instructions from https://github.com/noplay/docker-osx
curl https://raw.github.com/noplay/docker-osx/0.8.0/docker-osx > /usr/local/bin/docker-osx
chmod +x /usr/local/bin/docker-osx