refactor: apply default vs transform to xproj

refactor(spa-services): clean code

refactor(node-services): clean code, extract classes nto separate files

refactor(angular-services): prime cache cleanup

src/Microsoft.AspNetCore.SpaServices/Webpack/ConditionalProxyMiddlewareOptions.cs

@@ -0,0 +1,16 @@
+namespace Microsoft.AspNetCore.SpaServices.Webpack
+{
+    internal class ConditionalProxyMiddlewareOptions
+    {
+        public ConditionalProxyMiddlewareOptions(string scheme, string host, string port)
+        {
+            Scheme = scheme;
+            Host = host;
+            Port = port;
+        }
+
+        public string Scheme { get; }
+        public string Host { get; }
+        public string Port { get; }
+    }
+}