Brief discussion on arrays and global variables.
A short introduction to Promises, a new feature is ES6, to simplify asynchronous programmming.
A review of the NoSQL movement and some of its key characteristics
Installing, connecting to and initialising Mongoose/MOngo db from a node application.
Creating and using Objects in Mongo, using its promise based API
Replace the simple user and donation tracking with a database implementation - Mongo DB. Use the Mongoose ODM to create User + Donation models.