📝 Update README

README.md

@@ -1,6 +1,6 @@
 # Teamleader UI
 
-Teamleader UI is a set of [React](http://facebook.github.io/react/) components used in Teamleader.
+Teamleader UI is a set of [React](http://facebook.github.io/react/) components that implement the [Teamleader](https://www.teamleader.eu) design specification.
 
 ## Installation
 
@@ -16,13 +16,32 @@ In this minimal example, we import a `Button` with styles already bundled:
 
 ```js
 import React from 'react';
+import ReactDOM from 'react-dom';
 import { Button } from 'teamleader-ui';
 
-render(
-  <Button label="Hello World!" />
+ReactDOM.render(
+  <Button label="Hello World!" />,
+  document.getElementById('app')
 );
 ```
 
+## Contributing
+
+To work in the project you will need a node version supporting ES6 syntax. Although the project is built using the Babel compiler, we use some ES6 features on the development server. Consider using [n](https://github.com/tj/n) or [nvm](https://github.com/creationix/nvm) to handle different node versions!
+
+To start the spec site locally, follow these simple steps:
+
+```bash
+$ git clone https://github.com/teamleadercrm/teamleader-ui
+$ cd teamleader-ui/
+$ npm i
+$ npm start
+```
+
+Open up a browser and the local spec will be available at [http://localhost:3000/](http://localhost:3000/).
+
+
+
 ## License
 
 This project is licensed under the terms of the [MIT license](https://github.com/teamleadercrm/teamleader-ui/blob/master/LICENSE).