CQRS
중개자패턴 - commandBus
request -> post/delete/put(command) - command쪽
get(query) - service 쪽
모놀리틱 vs msa
comment에 post관련너무많다
관심사분리, 테스트 용이성
Reference
https://docs.microsoft.com/ko-kr/dotnet/architecture/microservices/microservice-ddd-cqrs-patterns/
