Adding image in packets about section is simple. Below is the step by step guide.
In your Dashboard page, click the "My files" menu.
Upload an image using the "+ Upload" button on the top right of the page.
You will get the page where you can upload images and it will be appear on "My files" page.
You can add any image from "My files" to the about section of the packets. To do it, click on "View" button of an image and then copy the URL of the image.
Then in your new packets publishing page or an edit package page, look for the toolbar Insert > Image and paste the image URL in the source field