DoorDash customers in the Phoenix metro area may have their next meal delivered to their homes not by a Dasher, but a Dot. The delivery company on Tuesday  unveiled  a friendly-looking red autonomous delivery bot named Dot, calling it the first such robot with the ability to maneuver within bike lanes and on roads and sidewalks, and the first to built expressly for local commerce.  The company touted Dot as a more efficient and economical way of delivering orders of smaller-sized goods, such as