title: Enable print for static file access
body: <p>I m using UseStaticFiles for static file serving. But I want to test when it serving or downloading my file?</p>
  
  <p>My code is:</p>
  
  <pre><code>app.UseStaticFiles(new StaticFileOptions
  {
      FileProvider = new PhysicalFileProvider(
                     Path.Combine(Directory.GetCurrentDirectory(), "RBFirmware")),
      RequestPath = "/File"
  });
  
  Console.WriteLine("downloading --");
  </code></pre>
  
  <p>in Startup.cs, But this downloading print comes to the only startup.</p>
  
  <p>I want "Console.WriteLine" log when /file folder accessed?</p>