NestJs Config , Loading different Env File

sampe.ts

import { Module } from '@nestjs/common';
import { ConfigModule } from '@nestjs/config';
import { join } from 'path';
require('dotenv').config();

@Module({
  imports: [
    ConfigModule.forRoot({

      envFilePath: process.env.APP_ENV === 'dev' ?
        join(process.cwd(), 'environment', 'dev.env') :
        join(process.cwd(), 'environment', 'prod.env'),

      isGlobal: true,
    })
  ],
  controllers: [],
  providers: [],
})
export class AppModule { }