Where is capacitor.config.json supposed to live?

[allidoisace]

Whenever I run npx cap sync && ionic cap run ios -l --external -p 3000 there are 2 capacitor.config.json that are created.

1 is created in the current directory with package.json.
1 is created in ./ios/App/App.

I would like to switch to a .ts file as recommended by capacitor 3 switch, but the capacitor.config.json changes in different circumstances for me, so I currently do not commit it.