Idea: I would like to order & pay at a restaurant without waiting for the waiter

It was 2019 when I had to wait for a long time for a waiter to come and give the menu, tell my preferred selection, and be done with the ordering. At that time, QR scan with mobile camera was not that that ubiquitous.

Fast forward to 2020, the pandemic has upended all traditional ways of doing things. There was an urgent need to create an online ordering system by one of my relative, so off we go to work.