DTO
String HOST_PORT = "8080";
.xml
com.ssafy.devoca
참고 : https://velog.io/@eunjios/개발자의-글쓰기-네이밍-컨벤션
참고 : https://hstory0208.tistory.com/entry/Java자바-코딩-컨벤션Code-Conventions