Update README.md

Author: Chandra06

README.md

@@ -4,7 +4,8 @@
  </a>
 </p>
 <h3 align="center">IONICFIREBASEAPP</h3>
-
+<a href="https://www.ionicfirebaseapp.com/coupons" rel=no follow><img src="https://res.cloudinary.com/dlx35qw0l/image/upload/v1574401451/Codecanyon/Black_Friday_Banner_1.png" alt="black friday sale">
+</a>
 <img src="https://res.cloudinary.com/dlx35qw0l/image/upload/v1574401451/Codecanyon/Black_Friday_Banner_1.png"/>
 
  <a href="https://www.ionicfirebaseapp.com/products/flutter-mobile-app"> <h3 align="center">DOWNLOAD TODO APP</h3> </a>