Point to yourdomain.pagerain.net instead of your own website. You can use a "Pull CDN" plugin to do this like W3 Total Cache if you use WordPress
PageRain will pick up the file from the origin and show it to the user. Next time another user requests the same file, it will be served immediately from a location near the user
When you sign up and create an endpoint, we generate a free SSL certificate for you and keep it renewed so you can serve content on https. Setting up a certificate takes up to 24 hours.