[Spring Boot] Rest API 구현 (Feat. spring date rest)

💡 Rest API 란? 참고 : https://withseungryu.tistory.com/100 💡 Spring data rest 란? spring-data-rest, a recent addition to the spring-dataproject, is a framework that helps you expose your entities directly as RESTful webservice endpoints. Unlike rails, grails or roo it does not generate any code achieving this goal. spring data-rest supports JPA, MongoDB, JSR-303 validation, HAL and many more. It is ..