Make sure you've got node.js version 0.10.38 installed.
Clone the repository and run the following command at project root;
$ npm Install # Installs node.js components listed in ./package.json
$ npm run build # Builds the react client and outputs JavaScripts to ./build/scripts
$ npm run dev # Starts the express server at *http://localhost:3000*
$ npm run test # Runs Jest unit tests