title: Can I get config fro database in appModule with @nestjs/cofnig?
body: <p>I want to use @nestjs to manage configuration files. </p>
  
  <p>Now I have used the following ways to connect mysql and redis. </p>
  
  <pre><code>// app.module.ts
  import { Module } from '@nestjs/common'
  import { SequelizeModule } from '@nestjs/sequelize'
  import { RedisModule } from 'nestjs-redis'
  import { ConfigModule } from '@nestjs/config'
  import { ExampleModule } from './example/example.module'
  import { UserModule } from './user/user.module'
  import config from './config' // I want to use @nestjs/config instead it
  
  @Module({
    imports: [
      SequelizeModule.forRoot(config.DATABASE),
      RedisModule.register(config.REDIS),
      UserModule,
      ExampleModule,
      ConfigModule.forRoot()
    ],
  })
  export class AppModule {}
  </code></pre>
  
  <p>Can I get their configuration information in appmodule via @ nestjs / config</p>