Update index.md

Author: CodeStix

docs/index.md

@@ -19,6 +19,8 @@ yarn add typed-react-form
 
 This library works with both **Javascript** and **Typescript**. Typescript is certainly preferred because of the enforced type-checking!
 
+**Make sure to restart `react-scripts` after installing.**
+
 ## Step 2: Creating a form
 
 ### Using the `useForm` hook