-<pre><code>~/arvados/apps/workbench$ <span class="userinput">bundle exec rails server --port=3031</span>
-</code></pre></notextile>
+<pre><code>themes_for_rails at /usr/local/rvm/gems/ruby-2.1.1/bundler/gems/themes_for_rails-1fd2d7897d75 did not have a valid gemspec.
+This prevents bundler from installing bins or native extensions, but that may not affect its functionality.
+The validation message from Rubygems was:
+ duplicate dependency on rails (= 3.0.11, development), (>= 3.0.0) use:
+ add_runtime_dependency 'rails', '= 3.0.11', '>= 3.0.0'
+Using themes_for_rails (0.5.1) from https://github.com/holtkampw/themes_for_rails (at 1fd2d78)
+</code></pre>
+</notextile>
+{% include 'notebox_end' %}
+
+This command aborts when it encounters an error. It's safe to rerun multiple times, so if there's a problem with your configuration, you can fix that and try again.
+
+h2. Set up Web server
+
+For best performance, we recommend you use Nginx as your Web server front-end, with a Passenger backend to serve Workbench. To do that:
+
+<notextile>
+<ol>
+<li>Install Nginx via your distribution or a backports repository.</li>
+
+<li><a href="https://www.phusionpassenger.com/documentation/Users%20guide%20Nginx.html">Install Phusion Passenger for Nginx</a>.</li>