We'll be building an application that allows Shopify storeowners to organize contests for their shoppers and randomly select a winner. Contests can be configured based on purchase history and timeframe. For example, a contest could be organized for all the customers who bought the newest widget within the last three days, or anyone who has made an order for any product in the month of August. To accomplish this, we'll need to be able to pull down order information from the Shopify store, generate a random winner, and show the storeowner the results.

Let's start out by creating a list of requirements for our application. We'll use this list to break our development into discrete pieces so we can easily measure our progress and also keep our focus on the important features. Of course, it's difficult to make a complete list of all the requirements and have it stick throughout the development process, which is why a common strategy is to develop in iterations (or sprints...