Adding link to playground

Author: technikhil314

projects/angular-datetimerangepicker/README.md

@@ -76,10 +76,12 @@ No offence here. These are good libraries but with modern frameworks they add mo
 
 ## Playground / configuration generator
 
-Check the demo [here](https://angular-datetimerangepicker.surge.sh)
+You can play around with all options [here](https://angular-datetimerangepicker.surge.sh)
 
 ## Demo
 
+Check the demo [here](https://angular-datetimerangepicker-demo.stackblitz.io)
+
 <br/>
 
 ## Roadmap