SpringBoot Hibernate Usage

https://www.javadevjournal.com/spring-boot/spring-boot-with-hibernate/ 

https://www.codejava.net/frameworks/spring-boot/connect-to-mysql-database-examples

https://dzone.com/articles/introduction-to-spring-data-jpa-part-6-bidirection

https://www.baeldung.com/jpa-one-to-one