Demonstrate a simple Webpack setup (#5185)

docs/samples/webpack-getting-started/src/index.js

@@ -0,0 +1,15 @@
+import SwaggerUI from 'swagger-ui'
+import 'swagger-ui/dist/swagger-ui.css';
+
+const spec = require('./swagger-config.yaml');
+
+const ui = SwaggerUI({
+  spec,
+  dom_id: '#swagger',
+});
+
+ui.initOAuth({
+  appName: "Swagger UI Webpack Demo",
+  // See https://demo.identityserver.io/ for configuration details.
+  clientId: 'implicit'
+});