Added a link to the GitHub issues page to the server error page

netbox/templates/500.html

@@ -17,6 +17,8 @@
                 <div class="panel-body">
                     <p>There was a problem with your request. This error has been logged and administrative staff have
                     been notified. Please return to the home page and try again.</p>
+                    <p>If you are responsible for this installation, please consider
+                    <a href="https://github.com/digitalocean/netbox/issues">filing a bug report</a>.</p>
                     <div class="text-right">
                         <a href="/" class="btn btn-primary">Home Page</a>
                     </div>