implement auto port support for socket bridge communication

ElectronNET.API/WebHostBuilderExtensions.cs

@@ -0,0 +1,32 @@
+using Microsoft.AspNetCore.Hosting;
+using System;
+
+namespace ElectronNET.API
+{
+    public static class WebHostBuilderExtensions
+    {
+        public static IWebHostBuilder UseElectron(this IWebHostBuilder builder, string[] args)
+        {
+            foreach (string argument in args)
+            {
+                if (argument.ToUpper().Contains("ELECTRONPORT"))
+                {
+                    BridgeSettings.SocketPort = argument.ToUpper().Replace("/ELECTRONPORT=", "");
+                    Console.WriteLine("Use Electron Port: " + BridgeSettings.SocketPort);
+                }
+            }
+
+            if(IsElectronActive())
+            {
+                builder.UseContentRoot(AppDomain.CurrentDomain.BaseDirectory);
+            }
+
+            return builder;
+        }
+
+        private static bool IsElectronActive()
+        {
+            return !string.IsNullOrEmpty(BridgeSettings.SocketPort);
+        }
+    }
+}