working with angular js and lumen

I have put AngularJS app files inside public/app folder in lumen.
I have index.php in resources/view folder which will be starting application point for frontend. And running lumen as

php -S localhost:8000 -t public. 

When I hit localhost:8000 from my browser, it should load my AngularJS/html frontend showing UI part. It’s not working as expected.

Is it an issue with loading those JS files (public/app folder) in index.html file? Is there any standard way to integrate and execute AngularJS and lumen altogether?