Add an article on how to build an offline-capable Notepad app using PWA principles (#6886)

src/data/roadmaps/frontend/content/pwas@PoM77O2OtxPELxfrW1wtl.md

@@ -6,5 +6,6 @@ Visit the following resources to learn more:
 
 - [@article@Learn PWA](https://web.dev/learn/pwa/)
 - [@article@MDN Web Docs: Progressive Web Apps ](https://developer.mozilla.org/en-US/docs/Web/Progressive_web_apps/)
+- [@article@Building a simple offline-capable Notepad app ](https://www.amitmerchant.com/Building-Simple-Offline-Notepad-Using-Service-Worker/)
 - [@video@Build a Progressive Web App](https://www.youtube.com/watch?v=sFsRylCQblw)
 - [@feed@Explore top posts about Web Development](https://app.daily.dev/tags/webdev?ref=roadmapsh)