🧱 Monolithic Architecture
A Monolith is a single, unified codebase where all modules (auth, user, payments, content, etc.) are part of one large app — running and deployed together.
Example:
/app → routes, controllers, models, views
One server, one DB, one deployment.
✅ Easy to build, debug & deploy for MVPs
❌ Hard to scale, maintain, and update; one crash = full app down
⚙️ Microservices Architecture
App split into small, independent services (Auth, Payments, Notifications, etc.) communicating via APIs (REST/gRPC/GraphQL).
Example:
Auth → :3001 | User → :3002 | Payment → :3003 | Gateway → :3000
✅ Independent scaling, faster deploys, isolated failures
