chore: Update getting started docs (#1451)

CONTRIBUTING.md

@@ -222,4 +222,4 @@ Contact the maintainers if you want to release a new version of a package.
 
 ## :pray: Credits
 
-This document is adapted from a template made by [@jessesquires](https://github.com/jessesquires).
+This document is adapted from [a template made by jessesquires](https://github.com/jessesquires/.github).

storybook/src/docs/developer-guide/getting-started.docs.mdx

@@ -11,12 +11,7 @@ import { Meta } from "@storybook/blocks";
 Install the packages you need, for instance:
 
 ```bash
-  npm install
-  @amsterdam/design-system-assets
-  @amsterdam/design-system-css
-  @amsterdam/design-system-react
-  @amsterdam/design-system-react-icons
-  @amsterdam/design-system-tokens
+npm install @amsterdam/design-system-assets @amsterdam/design-system-css @amsterdam/design-system-react @amsterdam/design-system-react-icons @amsterdam/design-system-tokens
 ```
 
 Import the components and stylesheets you need, for example:
@@ -45,3 +40,7 @@ To use the compact mode, import the compact CSS **after** the theme CSS, like so
 import "@amsterdam/design-system-tokens/dist/index.css";
 import "@amsterdam/design-system-tokens/dist/compact.css";
 ```
+
+## Contributing
+
+Do you want to contribute to this project? Please review [our Contributing guidelines](https://github.com/Amsterdam/design-system/blob/develop/CONTRIBUTING.md).