Great! A gallery of images shows up. How does it work?

1. In app.js inside the app.config() method, we use Angular’s $routeProvider to define the application routes.
2. We used .when() to map the URL / to to the controller HomeController and the template home.html. The HomeController uses the service js/services/photos.js to fetch the array of all photos from https://content.codecademy.com/courses/ltp4/photos-api/photos.json and stores it into $scope.photos. The home.html uses ng-repeat to loop through each item in the photos array and display each photo.
3. Otherwise if a user accidentally visits a URL other than /, we just redirect to / using .otherwise().
4. Now when a user visits /, a view will be constructed by injecting home.html into the <div ng-view></div> in index.html.