Add "AddUrl" to WireMockContainerBuilder to support grpc (#1246)

* Add "AddUrl" to WireMockContainerBuilder to support grpc

* fix

* fix for windows

* wip

* fix !

* change some example code

examples/WireMock.Net.TestcontainersExample/Program.cs

@@ -198,7 +198,7 @@ internal class Program
         var dummyNetwork = new NetworkBuilder()
             .WithName($"Dummy Network for {image ?? "null"}")
             .WithReuse(true)
-            .WithCleanUp(true)
+            // .WithCleanUp(true)
             .Build();
 
         var builder = new WireMockContainerBuilder()