Update tutorial.md (#747)

for 6.7.1

docs/tutorial.md

@@ -1,18 +1,14 @@
 # React on Rails Basic Tutorial
 
-This tutorial setups up a new Rails app with **React on Rails**, demonstrating Rails + React + Redux + Server Rendering.
+This tutorial setups up a new Rails app with **React on Rails**, demonstrating Rails + React + Redux + Server Rendering. It is updated to 6.7.1.
 
 After finishing this tutorial you will get application that can do the following (live on Heroku):
 
 ![example](https://cloud.githubusercontent.com/assets/371302/17368567/111cc722-596b-11e6-9b72-ac5967a60e42.gif)
 
 You can find here:
-* [Source code for this app](https://github.com/dzirtusss/hello-react-on-rails)
-* [Live on Heroku](https://hello-react-on-rails.herokuapp.com/)
-
-Old version of this app is here:
-* [Source code](https://github.com/justin808/test-react-on-rails-3)
-* [Live on Heroku](https://shakacode-react-on-rails.herokuapp.com/hello_world)
+* [Source code for this app in PR, using the --redux option](https://github.com/shakacode/react_on_rails-test-new-redux-generation/pull/15) and [for Heroku](https://github.com/shakacode/react_on_rails-test-new-redux-generation/pull/16).
+* [Live on Heroku](https://react-on-rails-redux-generator.herokuapp.com/)
 
 By the time you read this, the latest may have changed. Be sure to check the versions here:
 
@@ -69,7 +65,7 @@ git add -A
 git commit -m "Initial commit"
 ```
 
-update dependencies and generate empty app via `react_on_rails:install`. If you haven't done first git commit it will generate error and you just need to commit.
+update dependencies and generate empty app via `react_on_rails:install` or `react_on_rails:install --redux`. You need to first git commit your files before running the generator, or else it will generate an error.
 
 ```
 bundle
@@ -181,6 +177,32 @@ root "hello_world#index"
 
 ![09](https://cloud.githubusercontent.com/assets/20628911/17465018/1f3b685e-5cf4-11e6-93f8-105fc48517d0.png)
 
+Next, configure your app for Puma, per the [instructions on Heroku](https://devcenter.heroku.com/articles/deploying-rails-applications-with-the-puma-web-server).
+
+`Procfile`
+```
+web: bundle exec puma -C config/puma.rb
+```
+
+`config/puma.rb`
+```rb
+workers Integer(ENV['WEB_CONCURRENCY'] || 2)
+threads_count = Integer(ENV['RAILS_MAX_THREADS'] || 5)
+threads threads_count, threads_count
+
+preload_app!
+
+rackup      DefaultRackup
+port        ENV['PORT']     || 3000
+environment ENV['RACK_ENV'] || 'development'
+
+on_worker_boot do
+  # Worker specific setup for Rails 4.1+
+  # See: https://devcenter.heroku.com/articles/deploying-rails-applications-with-the-puma-web-server#on-worker-boot
+  ActiveRecord::Base.establish_connection
+end
+```
+
 Then after all changes are done don't forget to commit them with git and finally you can push your app to Heroku!
 
 ```
@@ -191,9 +213,11 @@ git push heroku master
 
 ![10](https://cloud.githubusercontent.com/assets/20628911/17465017/1f38fbaa-5cf4-11e6-8d86-a3d91e3878e0.png)
 
-Here it is:
+## Links
+These are updated for 6.7.1:
 
-* [Source code for this sample app](https://github.com/dzirtusss/hello-react-on-rails)
+* [PR for using the generator with the Redux option](https://github.com/shakacode/react_on_rails-test-new-redux-generation/pull/15)
+* [PR showing the changes to deploy to Heroku](https://github.com/shakacode/react_on_rails-test-new-redux-generation/pull/16)
 * [Live on Heroku](https://hello-react-on-rails.herokuapp.com/)
 
 Feedback is greatly appreciated! As are stars on github! If you want personalized help, don't hesitate to get in touch with us at [contact@shakacode.com](mailto:contact@shakacode.com).