FCM index.html diff refs https://github.com/firebase/quickstart-js/blob/master/messaging/index.html

fcm_index.html.patch

--- ../html.bak/index.html      2019-07-04 03:46:11.000000000 +0900
+++ index.html  2019-07-04 11:45:24.008447808 +0900
@@ -75,9 +75,22 @@
 <!-- Import and configure the Firebase SDK -->
 <!-- These scripts are made available when the app is served or deployed on Firebase Hosting -->
 <!-- If you do not serve/host your project using Firebase Hosting see https://firebase.google.com/docs/web/setup -->
-<script src="/__/firebase/6.2.4/firebase-app.js"></script>
-<script src="/__/firebase/6.2.4/firebase-messaging.js"></script>
-<script src="/__/firebase/init.js"></script>
+<script src="https://www.gstatic.com/firebasejs/6.2.4/firebase-app.js"></script>
+<script src="https://www.gstatic.com/firebasejs/6.2.4/firebase-messaging.js"></script>
+<script>
+  // Your web app's Firebase configuration
+  var firebaseConfig = {
+    apiKey: "AIzaSyCNp7t2Cug1TIjk-8WKF-QX9QVaU2m-UGM",
+    authDomain: "smd-pj01.firebaseapp.com",
+    databaseURL: "https://smd-pj01.firebaseio.com",
+    projectId: "smd-pj01",
+    storageBucket: "",
+    messagingSenderId: "596738022287",
+    appId: "1:596738022287:web:ddc64d7e8e3c8548"
+  };
+  // Initialize Firebase
+  firebase.initializeApp(firebaseConfig);
+</script>

 <script>
   // [START get_messaging_object]
@@ -86,7 +99,7 @@
   // [END get_messaging_object]
   // [START set_public_vapid_key]
   // Add the public key generated from the console here.
-  messaging.usePublicVapidKey('<YOUR_PUBLIC_VAPID_KEY_HERE>');
+  messaging.usePublicVapidKey('BArVAz799m079vJKEW-Fi3arbt6YdRXiLmmfYPZdlXs9_Mz_tk8UA__s9YgmhYqzvWY43XBeytB7AzsOFVyhbZs');
   // [END set_public_vapid_key]

   // IDs of divs that display Instance ID token UI or request permission UI.