Fix templates directory structure to produce correct nupkg output

templates/Microsoft.AspNetCore.SpaTemplates/knockout/ClientApp/boot.ts

@@ -0,0 +1,21 @@
+import './css/site.css';
+import 'bootstrap';
+import * as ko from 'knockout';
+import { createBrowserHistory } from 'history';
+import './webpack-component-loader';
+import AppRootComponent from './components/app-root/app-root';
+const baseUrl = document.getElementsByTagName('base')[0].getAttribute('href')!;
+const basename = baseUrl.substring(0, baseUrl.length - 1); // History component needs no trailing slash
+
+// Load and register the <app-root> component
+ko.components.register('app-root', AppRootComponent);
+
+// Tell Knockout to start up an instance of your application
+ko.applyBindings({ history: createBrowserHistory({ basename }), basename });
+
+// Basic hot reloading support. Automatically reloads and restarts the Knockout app each time
+// you modify source files. This will not preserve any application state other than the URL.
+if (module.hot) {
+    module.hot.accept();
+    module.hot.dispose(() => ko.cleanNode(document.body));
+}