ee site edit example.com
Above command opens /etc/nginx/sites-available/example.com in your default editor. When you make any changes, after saving file, this will also test and reload Nginx configuration
Pagespeed
To edit Pagespeed configuration of site use
ee site edit example.com --pagespeed
Above command opens /var/www/example.com/conf/nginx/pagespeed.conf in your default editor. When you make any changes, after saving file, this will also test and reload Nginx configuration
By default EasyEngine does not enables any filters for Pagespeed, you can add various filters from https://developers.google.com/speed/pagespeed/module/config_filters