nestjs elasticsearch module set up

1. npm install elasticsearch

npm i --save @nestjs/elasticsearch @elastic/elasticsearch

2. elasticsearch.module.ts

ElasticsearchModule.registerAsync({
  imports: [ConfigModule],
  useFactory: async (configService: ConfigService) => ({
    node: configService.get('ELASTICSEARCH_NODE'),
  }),
  inject: [ConfigService],
}),

3. service에 injection