Use Python and Flask to Manage Queues via SMS

The tutorial describes how to build an SMS queue management system using Python and the Flask framework. The application allows users to reserve a spot in line by sending a text message, receive status updates on their position in line, and be notified when it's time for them to arrive. The backend consists of routes for the views, webhook logic to handle incoming SMS messages, and helper functions to manage database queries and send notifications. The frontend includes two views: one for displaying the current wait list and another for managing user input. The application uses Nexmo's Messages API to send and receive text messages, and ngrok is used to forward traffic from a local server to a public URL.