BAD - NestJs minimal context with provider in multiple modules

import {Injectable, Module} from '@nestjs/common';
import {NestFactory} from '@nestjs/core';

@Injectable()
export class SlowService {
  constructor() {
    console.log(`Created SlowService`);
  }
}

@Injectable()
export class DbService {
  constructor() {
    console.log(`Created DbService`);
  }
}

@Module({
  imports: [],
  providers: [SlowService, DbService],
  exports: [SlowService, DbService]
})
export class BaseModule {}

@Module({
  imports: [],
  providers: [DbService],
})
export class OtherModule {}

@Module({
  imports: [
    BaseModule,
    OtherModule
  ],
})
export class AppModule {}

NestFactory.createApplicationContext(AppModule).then((app) => console.log('🥑 context created'));