README.md in serviceworker-rails-0.3.0 vs README.md in serviceworker-rails-0.3.1

@@ -57,9 +57,13 @@
 ```ruby
 config.serviceworker.headers["Service-Worker-Allowed"] = "/"
 config.serviceworker.headers["X-Custom-Header"] = "foobar"
 ```
 
+### Demo
+
+Check out the demo application, [Service Worker on Rails](https://serviceworker-rails.herokuapp.com/), to see various examples of using Service Workers in a Rails app.
+
 ## Development
 
 After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake spec` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.
 
 To install this gem onto your local machine, run `bundle exec rake install`. To release a new version, update the version number in `version.rb`, and then run `bundle exec rake release`, which will create a git tag for the version, push git commits and tags, and push the `.gem` file to [rubygems.org](https://rubygems.org).