Merge branch 'master' into 'kkj'

...in/java/umc/spring/post/config/security/SecurityUtil.java

src/main/java/umc/spring/post/data/entity/Like.java

src/main/java/umc/spring/post/repository/LikeRepository.java

src/main/java/umc/spring/post/service/PostServiceImpl.java