chore(yml): ddl-auto 설정 변경

 - validate 변경

Author: leebs0521

src/main/resources/application.yml

@@ -27,7 +27,7 @@ spring:
 
   jpa:
     hibernate:
-      ddl-auto: update
+      ddl-auto: validate
     properties:
       hibernate:
         format_sql: true