Simple download file asp.net core

Question

I want simply to go to www.mywebsite.com/SomeController and to download file located in my wwwroot folder with name myApp.apk

I have searched so many question and neither of them explains how to do it. All are complex and doesn't involve direct download like this.

So i have controller with index function and i need to return file download.

 public IActionResult Index() {
    return DownnloadMyFile("/myApp.apk");
}