doc: add more help for the notifications

src/App.vue

@@ -329,10 +329,7 @@ export default class App extends Vue {
       }
     } catch (error) {
       if (window.location.host.startsWith("localhost")) {
-        console.log(
-          "Ignoring this error getting VAPID for local development:",
-          error,
-        );
+        console.log("Ignoring the error getting VAPID for local development.");
       } else {
         console.error("Got an error initializing notifications:", error);
         this.$notify(
@@ -424,7 +421,7 @@ export default class App extends Vue {
     });
   }
 
-  async turnOnNotifications() {
+  public async turnOnNotifications() {
     return this.askPermission()
       .then((permission) => {
         console.log("Permission granted:", permission);