docs: add app/page.tsx code example

Author: AlexStack

README.md

@@ -101,6 +101,12 @@ Are you using this starter? Please add your page (and repo) to the end of the li
 
 ![image of folder structure](https://raw.githubusercontent.com/AlexStack/nextjs-materia-mui-typescript-hook-form-scaffold-boilerplate-starter/main/public/images/next-mui-folders.png)
 
+## app/page.tsx code example
+
+🚘🚘🚘 [**Click here to see an online demo of below code**](https://mui-nextjs-ts.vercel.app) 🚘🚘🚘
+
+![app/page.tsx code example](https://raw.githubusercontent.com/AlexStack/nextjs-materia-mui-typescript-hook-form-scaffold-boilerplate-starter/main/public/images/app-page-tsx.png)
+
 ## License
 
 - MIT