https://velog.io/@betterfuture4/웹-네트워크-기본개념-정리
https://prolog.techcourse.co.kr/studylogs/2279
https://velog.io/@ohzzi/Spring-Boot가-데이터베이스를-읽어오는-방법을-공식-문서를-통해-알아보자
https://velog.io/@betterfuture4/Spring-Controller-RestController-Annotations
https://velog.io/@betterfuture4/Spring-DI