index.html

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <title>Cartagrafia</title>
</head>

<body>
  <main ng-app="CartagrafiaApp"></main>

  <!-- AngularJS -->
  <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.8/angular.min.js"></script>
  <!-- Firebase -->
  <script src="https://www.gstatic.com/firebasejs/3.6.0/firebase.js"></script>
  <!-- AngularFire -->
  <script src="https://cdn.firebase.com/libs/angularfire/2.1.0/angularfire.min.js"></script>
  
  <script>
    // Initialize Firebase
    var config = {
      apiKey: "AIzaSyCzgpX4vtSkFoAJ7e77OI8FnsgZ-vvJskg",
      authDomain: "cartagrafia-df4e1.firebaseapp.com",
      databaseURL: "https://cartagrafia-df4e1.firebaseio.com",
      storageBucket: "cartagrafia-df4e1.appspot.com",
      messagingSenderId: "589565613544"
    };
    firebase.initializeApp(config);
  </script>
  <script src="main.js"></script>
</body>

</html>