A full-stack print-on-demand platform for a stationery shop. Customers upload documents via an installable React PWA, pay online through Razorpay, and receive WhatsApp notifications when prints are ready. Features include a Windows desktop printer agent that automatically polls the server and drives physical printers, JWT authentication, AWS S3/EC2/Elastic Beanstalk deployment, PDF processing with LibreOffice, and an EJS admin dashboard with real-time print queue management.