NestJS Config Module | Environment Variables Explained #51
🔥 Mastering NestJS in 2026– Complete Backend Course
Welcome to Mastering NestJS – Zero to Hero, a complete hands-on Hindi YouTube course where you’ll learn modern backend development using NestJS + TypeScript 🚀
This series is designed for beginners, frontend developers, and working professionals who want to build scalable, secure, and production-ready backend applications. We start from absolute basics and gradually move towards enterprise-level architecture and real-world use cases.
👉 📺 Watch the complete playlist here:
• NestJS for Developers 2026 | APIs, Auth, D...
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💡 What You’ll Learn in This Course
✅ NestJS fundamentals (Zero to Hero)
✅ REST APIs & GraphQL (real-world examples)
✅ Authentication & Authorization (JWT, OAuth, Sessions, Cookies)
✅ Database integration (PostgreSQL, MongoDB, TypeORM, Prisma)
✅ Monorepo architecture with NestJS
✅ Microservices & Event-Driven Systems
✅ Unit & Integration Testing
✅ CI/CD, Docker & Cloud Deployment (AWS)
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📚 Course Structure (Playlist Flow)
🔹 Section 1: NestJS Zero to Hero – Introduction
NestJS & Modern Backend Development
System Setup & Prerequisites
Complete Course Roadmap
🔹 Section 2: Getting Started with NestJS
NestJS CLI & Generated Code
Node.js Setup for NestJS
Why NestJS?
NestJS vs Express
Modular Code Architecture
🔹 Section 3: NestJS Basics with CRUD
Core NestJS Code Flow
Building REST CRUD APIs
Controllers & Services Explained
🔹 Section 4: NestJS Core Building Blocks
NestJS Request Lifecycle
Middleware, Guards & Core Components
CLI Deep Dive
🔹 Section 5: Dependency Injection & Swagger
Dependency Injection Made Simple
API Documentation with Swagger
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🚀 Advanced Modules (In-Depth Learning)
🔸 Module 1: NestJS Fundamentals & Architecture
REST & GraphQL APIs
Authentication (JWT, OAuth, Passport.js)
Monorepo Setup
Database Integration
Microservices & Event-Driven Systems
Testing & Cloud Deployment
🔸 Module 2: REST & GraphQL API Development
API Best Practices
GraphQL Code-First & Schema-First
API Versioning & Swagger
🔸 Module 3: Authentication & Security
JWT, OAuth2, Sessions, Cookies
RBAC & Refresh Tokens
Security Best Practices
🔸 Module 4: Databases & File Handling
PostgreSQL, Prisma & MongoDB
File Uploads (Multer)
Exception Filters & Interceptors
🔸 Module 5: Microservices & Messaging
Redis, RabbitMQ, NATS
Event-Driven Architecture
Job Queues with BullMQ
🔸 Module 6: GraphQL Deep Dive
Apollo Server
Resolvers, DTOs & Mutations
GraphQL Testing
🔸 Module 7: Testing in NestJS
Unit Testing with Jest
Integration Testing
GraphQL & Auth Testing
🔸 Module 8: DevOps & Deployment
Docker & CI/CD
AWS Lambda (Serverless)
EC2, ECS & Kubernetes
Publishing Custom NestJS Packages
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🎯 Who Is This Course For?
Beginners learning backend development
Frontend developers moving to backend
Node.js developers upgrading to NestJS
Professionals building real-world projects