chore: ddl-auto 변경

Author: devyejin

backend/src/main/resources/application.properties

@@ -4,7 +4,7 @@ spring.datasource.username=${DATABASE_USERNAME}
 spring.datasource.password=${MYSQL_ROOT_PASSWORD}
 spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
 spring.jpa.show-sql=true
-spring.jpa.hibernate.ddl-auto=create
+spring.jpa.hibernate.ddl-auto=update
 spring.docker.compose.lifecycle-management=start-and-stop
 logging.level.org.springframework.security=DEBUG
 spring.data.redis.host=${REDIS_HOST}