anchor.diff:      var current = $(this).attr('href');
       $('.platform-download').hide();
       $(current).show();
  -    $('#setup').show();
  +    if(current !== '#docker') {
  +      $('#setup_packages').show();
  +    }
  +    $('#setup_common').show();
   
       $(this).dropdown('toggle');
       return false;
  
positive.code:       Choose an OS <span class="caret"></span>
      </button>
      <ul class="dropdown-menu" role="menu">
        <li><a href="#ubuntu1204">Ubuntu 12.04 (Precise)</a></li>
        <li><a href="#ubuntu1404">Ubuntu 14.04 (Trusty)</a></li>
        <li><a href="#ubuntu1604">Ubuntu 16.04 (Xenial)</a></li>
  
negative.code: $ sudo make install</pre>
    </div>
  
    <div id="setup_packages" class="platform-download" style="display: none;">
      <p>Open the configuration file for editing:</p>
      <pre>sudo -e /etc/api-umbrella/api-umbrella.yml</pre>
  
      <p>In the config file, define an e-mail address for your first admin account:</p>
  
      <pre>web:
    admin:
      initial_superusers:
        - your.email@example.com</pre>
  
      <p>Start API Umbrella:</p>
      <pre>sudo /etc/init.d/api-umbrella start</pre>
    </div>
  
    <div id="setup_common" class="platform-download" style="display: none;">
      <p>Browse to your server's hostname. You should land on the default homepage:</p>
  
      <%= image_tag("../../images/default_homepage.png", :alt => "Default API Umbrella homepage", :class => "img-responsive img-center") %>
  