Fix templates directory structure to produce correct nupkg output

templates/Microsoft.DotNet.Web.Spa.ProjectTemplates/angular/ClientApp/app/app.module.server.ts

@@ -0,0 +1,14 @@
+import { NgModule } from '@angular/core';
+import { ServerModule } from '@angular/platform-server';
+import { AppModuleShared } from './app.module.shared';
+import { AppComponent } from './components/app/app.component';
+
+@NgModule({
+    bootstrap: [ AppComponent ],
+    imports: [
+        ServerModule,
+        AppModuleShared
+    ]
+})
+export class AppModule {
+}