That sounds like a pretty cool idea. To be honest, I appreciate a restaurant that is offering delivery services. Sometimes you want to eat from a restaurant but do not have time to visit it, or you are simply too lazy to get out of your house. In this situation, delivery services are really handy. Anyway, I recommend you implement a feature that the guys from https://www.postsendungsverfolgung.com/de/hermes-sendungsverfolgung.html have. It allows you to track your delivery, which is very handy when you are hungry and want to know where your deliveryman is.