All of these things (except the legal part) are trivial. You don't need a cdn, just use s3 or blob storage and put the blob id in the cdn. If you really want, y

All of these things (except the legal part) are trivial. You don't need a cdn, just use s3 or blob storage and put the blob id in the cdn. If you really want, you can use a cdn for responsive images based on screen width.