Server
A basic Node.js app using Express 4 & a few npm plugins.
Running Locally
Make sure you have Node.js installed.
$ npm install
$ npm start
Your app should now be running on localhost:5000.
Firebase
The Firebase secret key is not included here since it would give full admin rights to my account. So you will need to set up your own Firebase account / DB at https://firebase.google.com/ and generate a new private key to use in the app.