step-1: create a CustomerController on our foodme module
step-1: bind the modal dialog <div> element to our CustomerController
step-1: write a unit test for the CustomerController
step-2: give the form a name so we can access its validity
step-2: add required attributes to the input elements
step-2: disable the ‘Get Restaurants’ button when the form is invalid
step-2: Add end to end tests to check the validation is working