Startup Idea : Grocery Delivery

I'd like to make an app/website that is similar to Uber/Lyft, but with groceries. There are a lot of times where I need something from the grocery store, but have worked all day and don't feel like getting out and buying a few groceries. How convenient would it be to log into the app, select the nearest delivery agent and submit your grocery list? Users would browse items from the app and add them to their grocery list (with pictures to limit confusion). The agent would then receive a notification on his/her phone, choose whether or not to accept the job, then pick up the groceries on the list and make the delivery.