wtf is arch_backend?

This is a Node.js backend application that runs a server on your computer. Think of it as the invisible engine behind a web or mobile app, it handles the data, logic, and requests that a frontend (the user-facing part) sends to it. To get it working, you need to first install Node.js, which is a runtime environment that lets you run JavaScript code outside a web browser. The README provides straightforward installation steps for Mac (using Homebrew) and Windows. Once Node.js is set up, you download this repository, install its dependencies with npm install, and start it with npm start. The server will then run locally on your computer at http://localhost:4000, meaning any app or service connecting to it can send and receive data through that address. This type of backend is useful for developers building applications who need a local testing environment. You might use it if you're working on a web app or service and need a server to store user information, process requests, or manage business logic without deploying to the internet first. It's a common pattern in development, build and test everything locally before pushing it live. The README is quite minimal and doesn't detail what specific features or endpoints this backend provides, so the exact use case isn't entirely clear from the documentation alone. However, the setup is straightforward for anyone comfortable following installation instructions, making it accessible even to people new to backend development.