Building The Backend For Impextech: Custom Middleware, Mongoose Quirks, Product module and User module.

Just wrapped up the core setup for my e-commerce API (Impextech): Auth, Products, and Users. Everything is running on Node.js, Express, and TypeScript. Instead of just getting it to work, I spent this week focusing on security, keeping the code clean, and fixing some annoyances in my dev environment. Here’s a breakdown of what I built and a few "gotchas" I learned along the way. 1. Clean Architecture (Separation of Concerns) I split everything into Models, Services, and Controllers. It takes a l