Add steps on how to get started

Author: iOvergaard

docs/CONTRIBUTING.md

@@ -4,7 +4,7 @@ Please review this document to help to streamline the process and save everyone'
 
 This repo uses nodejs, so you should install `nodejs` as the package manager. See [installation guide](https://nodejs.org/en/).
 
-# Guidelines for contributions we welcome
+# Guidelines for contributions that we welcome
 
 Not all changes are wanted, so on occasion we might close a PR without merging it. We will give you feedback why we can't accept your changes and we'll be nice about it, thanking you for spending your valuable time.
 
@@ -47,6 +47,13 @@ The UI Library components are [web components](https://developer.mozilla.org/en-
 
 Using Typescript is mandatory when contributing to this repository, although it is not necessary to use it when consuming the components.
 
+### How to get started
+
+1. Make sure you have the recommended version of node.js and npm installed
+   1. Currently we use node.js v16 and npm v8
+2. Run `npm install`
+3. Run `npm run storybook` to start the storybook server, which we also use for development
+
 ### New component
 
 You can create a new component and that way contribute to the UI library. But before you do that, go to the [`./src/components`](https://github.com/umbraco/Umbraco.UI/tree/dev/src/components) and check if it's not already there. Components from that folder are very much WIP will be gradually moved to packages. You may also look for an inspiration in this [components list](COMPONENTS.md), where you can check what component is in what stage.