wtf is example-app--qr-code--remix?

This repository is the complete code for a Shopify app that lets store owners create and manage QR codes. It pairs with Shopify's official tutorial for building an app using Remix, a web framework. You can follow the tutorial step by step or just browse the code to see how a real Shopify app is put together. The app integrates directly into Shopify's admin dashboard, so merchants can use it without leaving Shopify. It uses Shopify's design system (called Polaris) to match the look and feel of the rest of the admin interface. Behind the scenes, the included Shopify tools handle authentication, communicate with Shopify's APIs, and listen for webhooks, automated notifications Shopify sends when things happen in the store. A command-line tool called the Shopify CLI handles local development by logging into your partner account, connecting to your app, setting up environment variables, creating a tunnel so you can test locally, and pushing configuration changes to Shopify. This project is aimed at developers who want to learn how to build Shopify apps, especially those following Shopify's tutorial. For example, a developer building their first e-commerce app could use this as a reference for how to structure authentication, handle API calls, and design an interface that feels native to Shopify. A merchant who wants QR code functionality could also use it as a starting point for a custom app rather than buying one from the Shopify App Store. The code is written in JavaScript but is fully set up for TypeScript if you prefer stricter typing. Once you are ready to go live, the README points you to Shopify's deployment documentation for hosting on services like Heroku or Fly.io, with a note to set a production environment variable. The README does not go into detail about the QR code features themselves, focusing instead on the setup, tooling, and architecture.