에러 내용
caused by: org.apache.catalina.lifecycleexception: failed to start component [standardengine[tomcat].standardhost[localhost].standardcontext[]]
Preferences(Ctrl+Alt+S) > Build, Execution, Deployment > Build Tools > Gradle > Build And Run Using: IntelliJ IDEA 적용
Project Structure(Ctrl+Alt+Shift+S) > Modules > 프로젝트 main > Paths > Output Path 를 '프로젝트경로\webapp(s)\WEB-INF\classes' 로 설정