Update README.md

Author: jamie-lemon

README.md

@@ -1,6 +1,6 @@
 # MuPDF WebViewer React Sample
 
-This sample provides a guide to integrate MuPDF WebViewer into a React project.
+This sample provides a guide to integrate [MuPDF WebViewer](https://webviewer.mupdf.com) into a React project.
 
 ## Prerequisites
 
@@ -9,9 +9,12 @@ This sample provides a guide to integrate MuPDF WebViewer into a React project.
 
 ## Before you start
 
-- Visit https://webviewer.mupdf.com to get a trial license.
+- Visit [https://webviewer.mupdf.com](https://webviewer.mupdf.com) to get a trial license.
 - Copy the license key and replace `YOUR_LICENCE_KEY` in `src/App.jsx` with the license key.
 
+> [!NOTE] 
+> Ensure to register `localhost` as a domain for your license key if you require test locally!
+
 ## Install
 
 ```shell