firebase-dbInit

  var config = {
    apiKey: "YOUR-API-KEY",
    authDomain: "YOUR-DB-DOMAIN",
    databaseURL: "YOUR-DB-URL",
    projectId: "YOUR-PROJECT-ID",
    storageBucket: "YOUR-STORE-BUCKET",
    messagingSenderId: "YOUR-SENDER-ID"
  };

  firebase.initializeApp(config);