Install Node. If you're using a Mac, the simplest way is with Homebrew
$ brew install node
Next, install of of the required Node packages:
$ npm install
You'll need Bower installed as well (the -g flag makes bower available globally, including at the CLI):
$ npm install -g bower
Finally, grab the front-end assets:
$ bower install
Now you can run the project with
$ gulp
By default this will run on port 3000.