You need to create an HTTP Push zone first, then you can upload the images to the file manager. You can refer to this article
After uploading the files, you need to take the URL from the console. The output URL format is like
http://push-XXX.5centscdn.com/path/to/image.jpg
Now you can use this URL for CDN delivery. To integrate the image in your website HTML code, please refer to the below-mentioned code.
<img src=”https://push-xxx.5centscdn.com/path/to/image.jpg”>
In case of CNAME, you can use this
<img src=”https://cdn.mydomain/path/to/image.jpg”>