I’m developing a new app and need a small-scope backend that can push real-time data changes to connected clients. Your job is to set up the server side, wire in a data store, and expose a handful of endpoints so the mobile team can subscribe to live updates without polling. Core requirements: • Real-time data synchronisation (WebSockets, Firebase Realtime DB, or a similar solution—whichever you’re fastest with). • Real time location-tracking •QR code scanning • Integration of hardware to software using a given protocol • Basic CRUD endpoints for the data objects we’ll sync. • Lightweight authentication layer (token or session-based) just to keep test traffic private. • A minimal admin dashboard: single-page view where I can log in, see records populate in real time, and toggle a status flag. Keep the code clear and modular so I can extend it later. A brief README that explains environment variables, installation, and how to start both the backend and dashboard locally will be enough documentation for this phase.