thymeleaf상속을 할 때 dialect dependency와
타임리프가 타임리프 표현을 읽을 수 있도록
//implementation 'nz.net.ultraq.thymeleaf:thymeleaf-layout-dialect'
implementation 'nz.net.ultraq.thymeleaf:thymeleaf-layout-dialect:3.3.0'
<html
xmlns:th="http://www.thymeleaf.org"
xmlns:layout="http://www.ultraq.net.nz/thymeleaf/layout"
layout:decorate="~{layout}"
>
을 적어줘야 한다.