Add demo link

README.md

@@ -2,7 +2,7 @@
 
 This Rails starter project fully integrates with dynamic sample content from your ButterCMS account, including main menu, pages, blog posts, categories, and tags, all with a beautiful, custom theme with already-implemented search functionality. All of the included sample content is automatically created in your account dashboard when you sign up for a free trial of ButterCMS.
 
-You can view a [live demo hosted on Heroku](link-to-demo), or you can click the button below to deploy your own copy of our starter project to the provider of your choice.
+You can view a [live demo hosted on Heroku](https://rails-starter-buttercms.herokuapp.com/), or you can click the button below to deploy your own copy of our starter project to the provider of your choice.
 
 [![Heroku Deploy Button](https://www.herokucdn.com/deploy/button.svg)](https://heroku.com/deploy?template=https://github.com/ButterCMS/rails-starter-buttercms/tree/main&env%5BRAILS_BUTTER_CMS_API_KEY%5D=check%20https://buttercms.com/settings)