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Storing/Exporting changes in frappe `frappe/public/js/frappe/widgets/number_card_widget.js`

I’ve made some changes in apps/frappe/frappe/public/js/frappe/widgets/number_card_widget.js, is there any way to export these changes to my custom-app ? so when someone installs “custom-app” the js is updated in frappe app? Is “forking” the frappe repo only option ?
I’ve read about fixtures, but i don’t think that is any useful here.

OR

Is there a way to override “number_card_widget.js” in “custom-app” ? this way i dont have to modify frappe app itself.