Generate a starter .flowconfig file on project creation #3506

This is not a bug report; it's a feature suggestion.

The Feature

Can I propose that in the future, when a project is created with create-react-app, it includes a starter.flowconfig file in the root.

Ideally the .flowconfig file should keep the Flow errors to a minimum, with an emphasis on Prop errors. I gather Flow is increasingly being recommended over PropTypes.

The Rationale

This feature I believe would offset (somewhat) the increased complexity of using Flow in lieu of Proptypes.

Thanks
Charlie