doc: documentation charts integration

Author: peterpeterparker

doc/slides/slides.md

@@ -343,7 +343,9 @@ The slide "Chart" relies on the charts components `<deckgo-pie-chart/>` and `<de
 
 ##### Installation
 
-**Important note**: The [DeckDeckGo] charts components are provided in separate extra library. If you wish to add charts to your presentation, you will need to install this extra component from a CDN or [npm](https://www.npmjs.com/package/deckdeckgo). See its related [installation guide](https://github.com/fluster/deckdeckgo-charts#getting-started).
+**Important note**: The [DeckDeckGo] charts components are provided in separate extra library. If you wish to add charts to your presentation, you will need to install and integrate this extra component from a CDN or [npm](https://www.npmjs.com/package/deckdeckgo) as described below or in its [installation guide](https://github.com/fluster/deckdeckgo-charts#getting-started).
+
+###### 1. Installation guide
 
 From a CDN:
 
@@ -357,6 +359,18 @@ From NPM:
 npm install deckdeckgo-charts
 ```
 
+###### 2. Integration
+
+Once installed, if you use the [DeckDeckGo] starter kit, you would need to integrate, respectively load, the chart components as the following in your `src/index.js`:
+
+```
+import { defineCustomElements as deckDeckGoChartsElements } from 'deckdeckgo-charts/dist/loader';
+
+await deckDeckGoChartsElements(window);
+``` 
+
+###### Side notes
+
 The reasons behind are the following:
 
 1. If you don't use charts, you will not have to install unnecessary dependencies