You can, you however will need a service like Photobucket or your own server to do so.
Simply upload the image file to aforementioned service and then get the direct link to the file (which, since it’s an image, will end with and image file extension (.bmp, .jpg, .png etc.) and replace the image in the *image command with the direct link, so instead of
*image interestingpicture.jpg
it’d be
*image http://websitehere.com/example/examplefolder/examplepicture.bmp
