chore(doc): Improve documentation regarding entryComponents

Author: mpalourdio

README.md

@@ -138,11 +138,23 @@ The different spinners available are referenced in [this file](src/lib/spinkits.
 You can define your own spinner component in place of the built-in ones. The needed steps are:
 
 - Create your component
-- Add it to the [entryComponents](https://angular.io/guide/ngmodule-faq#what-is-an-entry-component) array in your module's configuration (not necessary anymore with [ivy](https://next.angular.io/guide/deprecations#entryComponents))
 - Reference your component as a public property in your `app.component.ts`
-- Reference the predefined property in the ng-http-loader component selector like this:
+- Reference the predefined property in the ng-http-loader `entryComponent` component selector like this:
+```typescript
+import { Component } from '@angular/core';
+import { AwesomeComponent } from 'my.awesome.component';
+
+@Component({
+    selector: 'app-root',
+    templateUrl: './app.component.html',
+    styleUrls: ['./app.component.css']
+})
+export class AppComponent {
+    public awesomeComponent = AwesomeComponent;
+}
+```
 ```xml
-<ng-http-loader [entryComponent]="myAwesomeComponent"></ng-http-loader>
+<ng-http-loader [entryComponent]="awesomeComponent"></ng-http-loader>
 ```
 
 You can find some examples [here](https://gist.github.com/mpalourdio/2c0bec03d610b24ff49db649fbb69a48) and [here](https://gist.github.com/mpalourdio/e05b4495de2abeeecfcf92d70e4ef93e).