Host game on facebook

Hi! I’m trying to host a game on Facebook, but I’m getting some errors:
I added the following script to the head of the index.html file

Now another error is happening, a message appears saying I have to “include a package configuration in your upload”, Facebook left a link with a tutorial on how to do this package configuration:

I read it, but I couldn’t figure out how to create this .JSON file, so if anyone knows how to create this load file and can help me, I’m grateful.

The game is ready, the problem is to host it on Facebook Instant Games.