What components are included in a module in NestJS?

In NestJS, a module is the main building block of an application that groups related components. A module typically includes:

• Controllers — classes that handle incoming HTTP requests and return responses.
• Providers — services and other classes that are injected and provide business logic.
• Imports — other modules necessary for the current module to function.
• Exports — components (usually providers) that the module makes available to other modules.

Example of a module:

import { Module } from '@nestjs/common';
import { UsersController } from './users.controller';
import { UsersService } from './users.service';

@Module({
  controllers: [UsersController],
  providers: [UsersService],
  exports: [UsersService],
})
export class UsersModule {}

Thus, the module organizes the application's structure, ensuring encapsulation and reusability of components.