### Relevant Articles: 
- [Access the Same In-Memory H2 Database in Multiple Spring Boot Applications](https://www.baeldung.com/spring-boot-access-h2-database-multiple-apps)
- [Spring Boot With H2 Database](https://www.baeldung.com/spring-boot-h2-database)
- [Hibernate @NotNull vs @Column(nullable = false)](https://www.baeldung.com/hibernate-notnull-vs-nullable)
- [Quick Guide to Hibernate enable_lazy_load_no_trans Property](https://www.baeldung.com/hibernate-lazy-loading-workaround)
