Error Rails 4 console on staging or production
<p>Join in my office the following command:</p>

<pre><code>RAILS_ENV=production rails s production
</code></pre>

<p>And I get the following error:</p>

<pre><code>/usr/local/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib/rack/handler.rb:78:in `require': cannot load such file -- rack/handler/production (LoadError)
</code></pre>

<p>Please, help!!</p>