Ruby on Rails helps you to quickly get your web applications up and running. However, deployment is not an issue solved by the framework. In this section, we'll see how to write the simplest possible recipe to deploy a Rails application, using unicorn as the application server and SQLite as the database.
Make sure that you have a cookbook called my_cookbook and that the run_list of your node includes my_cookbook, as described in the Creating and using cookbooks recipe in Chapter 1, Chef Infrastructure.
Create Berksfile in your Chef repository including my_cookbook:
mma@laptop:~/chef-repo $ subl Berksfile
cookbook 'my_cookbook', path: './cookbooks/my_cookbook'