in httpd.conf:
LoadModule fcgid_module /usr/lib/apache2/modules/mod_fcgid.so

<IfModule mod_fcgid.c>
  AddHandler fcgid-script .fcgi
  SocketPath /var/lib/apache2/fcgid/sock
  IPCCommTimeout 40
  IPCConnectTimeout 10
</IfModule>

in website.conf
<VirtualHost *>
        ServerAdmin adm@foo.bar
        ServerName foo.bar

        DocumentRoot /home/foo/websites/foo.bar/public/
        CustomLog /home/foo/websites/foo.bar/log/apache2-access.log combined
        ErrorLog /home/foo/websites/foo.bar/log/apache2-error.log

        DefaultInitEnv RAILS_ENV production
        <Directory /home/foo/websites/foo.bar/public>
                Options ExecCGI +FollowSymLinks
                AllowOverride all
                AddHandler fcgid-script .fcgi .fcg .fpl
                Order allow,deny
                Allow from all
        </Directory>
</VirtualHost>