modified readme file

Author: somratpro

README.md

@@ -50,6 +50,8 @@ gulp
 ```
 After that, it will open up a preview of the template in your default browser, watch for changes to core template files, and live reload the browser when changes are saved.
 
+👉🏻 [visit documentation](https://docs.themefisher.com/constra/)
+
 
 <!-- reporting issue -->
 ## Reporting Issues