updated readme

Author: thomashorrobin

packages/react-scripts/README.md

@@ -5,3 +5,14 @@ Please refer to its documentation:
 
 - [Getting Started](https://github.com/thomashorrobin/create-react-app-rust/blob/rust/README.md) – How to create a new app.
 - [User Guide](https://github.com/facebook/create-react-app/blob/master/packages/react-scripts/template/README.md) – How to develop apps bootstrapped with Create React App.
+
+
+## Quick Overview
+
+```sh
+npx create-react-app my-app --scripts-version react-scripts-rust
+cd my-app
+npm start
+```
+
+After the project has loaded in Chrome any changes in `src/lib.rs` should result in an instant update in the browser.