app/views/pages/404.html.erb
<% content_for :title do %>404 Page Not Found<% end %>
<% #TODO: refactor this for Bootstrap framework %>
<section id="about">
<h3>Page not found</h3>
<p>We're sorry, but we couldn't find the page you requested</p>
<small>Server cannot find the file you requested.
File has either been moved or deleted,
or you entered the wrong URL or document name.
Look at the URL. If a word looks misspelled, then correct it and try it again.
If that doesn't work backtrack by deleting information between each backslash,
until you come to a page on that site that isn't a 404.
From there you may be able to find the page you're looking for.</small>
</section>