docs: update readme (carbon-design-system#19)

README.md

@@ -1,7 +1,13 @@
-This project was bootstrapped with [Create React App](https://github.com/facebook/create-react-app).
+## Carbon Tutorial
+
+This tutorial will guide you in creating a React app with the [Carbon Design System](https://www.carbondesignsystem.com/). We’ll teach you the ins and outs of using Carbon components, while introducing web development best practices along the way.
+
+Get started by visiting the [tutorial instructions](https://www.carbondesignsystem.com/tutorial/overview/).
 
 ## Available Scripts
 
+This project was bootstrapped with [Create React App](https://github.com/facebook/create-react-app).
+
 In the project directory, you can run:
 
 ### `npm start`