Poster Parlor is a modern full-stack e-commerce application built using a scalable Nx monorepo architecture. It features a Next.js frontend and a NestJS backend with MongoDB, providing a complete online shopping experience for posters. The platform includes product browsing, search, shopping cart, secure authentication (Google OAuth + JWT), order management, payment integration (Razorpay), and product reviews. It also comes with an admin dashboard for managing products, users, and orders. The backend is designed using modular NestJS architecture with reusable libraries for authentication, in