docs(example-getting-started): remove controller refs from juggler.md

packages/example-getting-started/docs/juggler.md

@@ -10,33 +10,42 @@ on those sources of data.
 It also provides many of the functions and interfaces we'll require for setting
 up our new LoopBack application, which is why we're starting here.
 
-The application template comes with a controller, and some default wireup in
-`src/application.ts` that handles the basic configuration for your application.
-For this tutorial, we won't need `ping.controller.ts` or its corresponding test,
-but you can leave them in for now.
-
-Now that you have your setup, it's time to modify it to add in
-`@loopback/repository`. Install this dependency by running
-`npm i --save @loopback/repository`.
-
-Next, modify `src/application.ts` to change the base class of your app to use
-the `RepositoryMixin`:
+The `application.ts` file that came with the application template should already
+make use of the `RepositoryMixin`, which provides the functions required to use
+the Legacy Juggler in your application.
 
 #### src/application.ts
 ```ts
 import {ApplicationConfig} from '@loopback/core';
 import {RestApplication} from '@loopback/rest';
-import {PingController} from './controllers/ping-controller';
-import {Class, Repository, RepositoryMixin} from '@loopback/repository';
 
-export class TodoApplication extends RepositoryMixin(RestApplication) {
+/* tslint:disable:no-unused-variable */
+// Do not remove!
+// Class and Repository imports required to infer types in consuming code!
+// Binding and Booter imports are required to infer types for BootMixin!
+import {BootMixin, Booter, Binding} from '@loopback/boot';
+import {
+  Class,
+  Repository,
+  RepositoryMixin,
+} from '@loopback/repository';
+/* tslint:enable:no-unused-variable */
+
+export class TodoApplication extends BootMixin(
+  RepositoryMixin(RestApplication),
+) {
   constructor(options?: ApplicationConfig) {
     super(options);
-    this.setupControllers();
-  }
-
-  setupControllers() {
-    this.controller(PingController);
+    this.projectRoot = __dirname;
+    // Customize @loopback/boot Booter Conventions here
+    this.bootOptions = {
+      controllers: {
+        // Customize ControllerBooter Conventions here
+        dirs: ['controllers'],
+        extensions: ['.controller.js'],
+        nested: true,
+      },
+    };
   }
 }
 ```