add a socket timeout

Author: baronfel

src/Containers/Microsoft.NET.Build.Containers/Registry/DefaultRegistryAPI.cs

@@ -30,7 +30,12 @@ internal DefaultRegistryAPI(string registryName, Uri baseUri, ILogger logger)
 
     private static HttpClient CreateClient(string registryName, Uri baseUri, ILogger logger, bool isAmazonECRRegistry = false)
     {
-        var innerHandler = new SocketsHttpHandler();
+        var innerHandler = new SocketsHttpHandler()
+        {
+            UseCookies = false,
+            // the rest of the HTTP stack has an infinite timeout (see below) but we should still have a reasonable timeout for the initial connection
+            ConnectTimeout = TimeSpan.FromSeconds(30)
+        };
 
         // Ignore certificate for https localhost repository.
         if (baseUri.Host == "localhost" && baseUri.Scheme == "https")