updated intro

Signed-off-by: bidi <bidi@apidemia.com>

Author: bidi47

docs/book/v5/introduction/introduction.md

@@ -3,3 +3,5 @@
 Dotkernel Admin is an application (skeleton) intended for quickly setting up an administration site for your platform.
 It's a fast and reliable way to manage records in your database with a simple table-based approach, and also to build reports and graphs to monitor your platform.
 The many graphical components at your disposal ensure an intuitive user experience.
+
+Check out our [demo](https://v5.dotkernel.net/).