Support new config options to launch the Node process with a debug listener. This is compatible with node-inspector.

src/Microsoft.AspNetCore.NodeServices/Configuration/NodeServicesOptions.cs

@@ -21,5 +21,7 @@ namespace Microsoft.AspNetCore.NodeServices
         public string ProjectPath { get; set; }
         public string[] WatchFileExtensions { get; set; }
         public ILogger NodeInstanceOutputLogger { get; set; }
+        public bool LaunchWithDebugging { get; set; }
+        public int? DebuggingPort { get; set; }
     }
 }