References - SYS4U OPEN WIKI http://wiki.sys4u.co.kr/pages/viewpage.action?pageId=7766819 - Learning Spring Boot 2.0 https://www.amazon.com/Learning-Spring-Boot-2-0-microservices/dp/1786463784/ref=sr_1_1?ie=UTF8&qid=1549250180&sr=8-1&keywords=learning+spring+boot+2.0