Use author avatar on notification

app/models/inbox.rb

@@ -38,6 +38,7 @@ class Inbox < ApplicationRecord
                 question.user.profile.safe_name
               end
       ),
+      icon:  question.author_is_anonymous ? "/icons/maskable_icon_x128.png" : question.user.profile_picture.url(:small),
       body:  question.content
     }
   end

public/service_worker.js

@@ -6,7 +6,7 @@ self.addEventListener('push', function (event) {
     event.waitUntil(self.registration.showNotification(notification.title, {
       body: notification.body,
       tag: notification.type,
-      icon: "/icons/maskable_icon_x128.png"
+      icon: notification.icon,
     }));
   } else {
     console.error("Push event received, but it didn't contain any data.", event);