This container doesn't force you to configure any package.json files or prepare to run "npm install". You should commit your packages anyway.
The container exposes port 8080 by default and expects the source of your application to mount under /mnt/app. If you don't provide any command it will run 'node /mnt/app/index.js' by default.
Base image: "debian:wheezy"
The tag corresponds to installed node version.