Deploy Book Review App (Three-Tier Architecture) on AWS

Deploying a full-stack app in the cloud sounds glamorous—until you’re debugging a 403 Forbidden error at 2 a.m. Here’s how I survived my DevOps capstone project—and what you can learn from it. ** What Is This Project? I recently completed Assignment 4 of the DevOps Zero to Hero course by Pravin Mishra, a hands-on challenge to deploy the Book Review App on AWS using real-world, production-grade architecture . The app is simple in concept: Browse books Read reviews Log in and write your own But under the hood? It’s a three-tier masterpiece : Frontend : Next.js (React with server-side rendering) Backend : Node.js + Express (REST API) Database : MySQL (via Amazon RDS) And the goal wasn’t just to “make it work.” It was to build it the way real companies do : ✅ High availability ✅ Network isolation ✅ Auto-scaling ✅ Secure traffic flow No pressure, right? * The Architecture: Like Building a Castle Here’s what I built: Internet ↓ Public Application Load Balancer (ALB) ↓ Web Tier (Next.js on EC