add documentation for creating new modules and CRUD resources in README

README.md

@@ -226,6 +226,71 @@ module.exports = {
 npm run db:migrate
 ```
 
+## Creating New Modules
+
+NestJS CLI provides a powerful generator to create new modules with all necessary files.
+
+### Generate a complete CRUD resource:
+```bash
+nest g resource products
+```
+
+This will prompt you to:
+- Choose transport layer (REST API, GraphQL, Microservice, WebSockets) - Select **REST API**
+- Generate CRUD entry points? - Select **Yes**
+
+This command creates:
+```
+src/modules/products/
+├── dto/
+│   ├── create-product.dto.ts
+│   └── update-product.dto.ts
+├── entities/
+│   └── product.entity.ts
+├── products.controller.ts
+├── products.module.ts
+├── products.service.ts
+└── products.controller.spec.ts
+```
+
+### Other useful generators:
+
+Generate a module only:
+```bash
+nest g module products
+```
+
+Generate a controller:
+```bash
+nest g controller products
+```
+
+Generate a service:
+```bash
+nest g service products
+```
+
+Generate a guard:
+```bash
+nest g guard auth/guards/custom
+```
+
+Generate a decorator:
+```bash
+nest g decorator common/decorators/custom
+```
+
+Generate a middleware:
+```bash
+nest g middleware common/middleware/custom
+```
+
+After generating a new module, remember to:
+1. Create the corresponding Sequelize model in `src/database/models/`
+2. Create a migration for the database table
+3. Add the model to `SequelizeModule.forFeature([])` in your module
+4. Update DTOs with proper validation decorators
+
 ## Contributors
 
 - Daffa Praramadhana - [daffa.praramadhana@mdd.co.id](mailto:daffa.praramadhana@mdd.co.id)