feat : jpa 시간 변경

backend/src/main/resources/application.properties

@@ -23,6 +23,7 @@ spring.mvc.pathmatch.matching-strategy=ant_path_matcher
 spring.jpa.database=mysql
 spring.jpa.hibernate.ddl-auto=update
 spring.jpa.show-sql=true  
+spring.jpa.properties.hibernate.jdbc.time_zone=UTC
 management.endpoints.web.exposure.include=health,info
 management.endpoint.health.show-details=always
 spring.rabbitmq.host=${RABBITMQ_HOST}