Deep links from website

I am wondering how do I set up app.json to have the intent URL allow me to:

  • open the app if its installed.

  • open google play store if its no installed

I read the document but seems there is nothing related to this.

I think you need to read the documentation again, it is right there as an example of what to put in your app.json:

You’ll also have to add the documented file to your website:
/.well-known/assetlinks.json