itswadesh/simple-appointment ? reverse-engineered prompt

Build me a simple appointment booking web app that works as a single page site.

I want users to be able to create, view, edit, and delete appointments, and have the data saved in MongoDB through a Node.js backend. The front end should be built with AngularJS and feel clean and easy to use, with a form for booking an appointment and a list or calendar style view for seeing existing bookings. Include basic validation so people can’t submit empty or bad data, and make the app feel polished enough to use right away.

Set it up so I can run it locally with a normal development command, and add whatever environment config is needed for MongoDB connection settings. If you need to check current docs or best practices for AngularJS, Node, or Mongo setup, go ahead and look them up online.