spring-boot 2.4 이상 변경사항

- spring-boot 2.6 release note

https://luvstudy.tistory.com/m/158


- spring-boot 2.4 변경사항

https://tangoblog.tistory.com/m/13

https://spring.io/blog/2020/08/14/config-file-processing-in-spring-boot-2-4

https://github.com/spring-projects/spring-boot/wiki/Spring-Boot-Config-Data-Migration-Guide


- application.yml 구동방식 변경

https://data-make.tistory.com/722

http://honeymon.io/tech/2021/01/16/spring-boot-config-data-migration.html

https://multifrontgarden.tistory.com/m/277?category=644080


- spring-boot 2.X 사용시 주의사항

http://honeymon.io/tech/2019/06/17/spring-boot-2-start.html