trying to update host settings

I am trying to setup Apache to run on port 8080 but I do not see the entries suggested how can I add them I have run sudo nano /etc/apache2/ports.conf

and this is what my file looks like http://prntscr.com/7084yh

the tutorial says Find and change the following lines to have apache running on port 8080, accessible only from the localhost:

NameVirtualHost 127.0.0.1:8080 Listen 127.0.0.1:8080

can I just add these lines to the ports.conf file ?

thanks Mike