docs: getting started

README.md

@@ -8,6 +8,32 @@ Simple vanilla JS library to handle shopping cart with
 common methods following
 [E-Com Plus cart object model](https://developers.e-com.plus/docs/api/#/store/carts/carts)
 
+## Getting started
+
+**This library is available for browser only**
+
+Include minified bundle via CDN:
+
+```html
+<script src="https://cdn.jsdelivr.net/npm/@ecomplus/shopping-cart@0/dist/shopping-cart.min.js"></script>
+```
+
+### With bundlers
+
+If using `webpack` or `browserify` (or relateds),
+you can also install the
+[npm package](https://www.npmjs.com/package/@ecomplus/shopping-cart):
+
+```bash
+npm install --save @ecomplus/shopping-cart
+```
+
+And import the bundle file:
+
+```js
+import '@ecomplus/shopping-cart'
+```
+
 ## Documentation
 
 [`EcomCart` object and methods](https://developers.e-com.plus/shopping-cart/EcomCart.html)