We assume that you already know how to run the Google App Engine applications from a command line, but if not you should refer to the documentation. Execute in your terminal
gulp from the root directory
$ cd /path/to/phonebook $ npm install $ gulp
If everything went smoothly you can test the application by visiting the following URL in your web browser:
Feel free to spend some time by clicking on the different menus. As a first change within the app you can sign in as administrator and after visiting the http://localhost:3000/admin/config/ change the Brand Name from gae-init to Phonebook (or to anything else you like). By doing that you should see on the top left corner the new name for your application.