app/static/initFirebase.js

// Copyright 2018 Google LLC.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// Script for configuring Firebase.
// See https://firebase.google.com/docs/web/setup for more information.

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

firebase.initializeApp(config);