Firebase Cloud Messaging Integration both Web and Mobile

Hi All,

I have a project that requires a push notification and I saw that in outsystems I can use FCM component to do this. 

Here are the requirements:

1. Web application will trigger the notifications

2. Mobile application will received the notifications

I found this article ->

but it does not cover most of the major parts especially in web. 

What are the things I need to integrate it in web and mobile?

Is there a sample project that I can refer to?

Thank you very much