Push notification via json

I hope to be in the right place. i am using ionc 3 to recover data from drupal 7 in json format and everything is fine. Now I try to send notification push whenever an article is posted on the drupal site.
I found a firebase drupal module for cloud messaging
if there is someone who has had this problem all information is welcome. Or as an example of a function that will store in real time the in jon and prevent when there is a new entry for it to be the object of the push notification
Thank you
(sorry for the language I translate french via google transate)