We would like to have our service fees built into the image itself so that all billing is done by DigitalOcean and paid out to us. Right now users just setup a server with our images. Would you be able to add in an additional amount we can charge users ONTOP of the price? (Ex. $6 server basic but with our tech in it we would like to add $X more ontop. DigitalOcean would handle all the billing and pay us the extra fees). Whats possible?