Add some notes on running/testing the app locally

README.md

@@ -11,3 +11,19 @@ that keep you from taking that all important first step into a larger world.
 With the Ruby Koans Online, you can dip your big toe into a larger world no matter
 where you are or what you're doing. So what are you waiting for? Try the Ruby Koans
 Online now and take your first step into the wonderful world of Ruby.
+
+## Setting up the app locally
+
+### Ruby Dependencies
+
+The koans currently run on ruby 1.8.7. Dependencies are handled by [bundler](http://gembulder.com). To install all the necessary gems, run `bundle install`.
+
+### Node.js Dependencies
+
+The ruby koans online are tested using [zombie.js](http://zombie.labnotes.org/). To install all the necessary packages, run `npm install`.
+
+### Development
+
+To start the development server, run `shotgun`. Shotgun is an automatic reloading version of the rackup command that's shipped with Rack. You can learn
+more about it [here](https://github.com/rtomayko/shotgun.git).
+