Test Notification test
Reference site: startup : https://developers.google.com/web/fundamentals/getting-started/push-notifications/?hl=en https://mobiforge.com/design-development/web-push-notifications
firefox : https://serviceworke.rs/
web push : https://developers.google.com/web/updates/2016/03/web-push-encryption?hl=en
web push php : https://github.com/Minishlink/web-push
other example : https://www.design19.org/blog/chrome-push-notifications/
web push in java : https://github.com/MartijnDwars/web-push