Vue send push notification with Firebase

see how to send push notification to browser with Firebase cloud messaging or FCM in Vue js
Vue app source : github.com/ben...
admin.js : gist.github.co...
00:00:09 create Firebase project
00:00:33 create a web app in Firebase console
00:00:43 create new Vue app
00:02:24 getToken
00:03:12 get VAPID KEY
00:04:04 service worker
00:04:44 get message in forground
00:05:16 setup service worker
00:07:35 send test message
00:09:13 send notifications from server