title: Where is the default "Welcome Aboard" page located in my app?
body: <p>I scoured my app's directories, and I can't find the html page for the default rails Welcome Aboard page.  I also cannot find a route for the default Welcome Aboard page in routes.rb.  How does my rails app route <code>http://localhost:3000/</code> to a non-existent page in my app?</p>
  
  <p>The rails server produces this information:</p>
  
  <pre><code>Started GET "/" for 127.0.0.1 at 2013-07-31 02:00:13 -0600
  Processing by Rails::WelcomeController#index as HTML
    Rendered /Users/7stud/.rvm/gems/ruby-2.0.0-p247@railstutorial_rails_4_0/gems/railties-4.0.0/lib/rails/templates/rails/welcome/index.html.erb (0.1ms)
  Completed 200 OK in 3ms (Views: 2.5ms | ActiveRecord: 0.0ms)
  </code></pre>
  
  <p>So it looks to me like there is a controller buried in a gem somewhere that handles the request.</p>