Setup H2 db Add required dependency for h2 Enable UI by spring.h2.console.enabled = true Launch the app - check the logs for URL and dbUrl , provide dburl over console login App logs 05:30 INFO 6117 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext 2023-06-30T17:46:18.383+05:30 INFO 6117 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 1295 ms 2023-06-30T17:46:18.429+05:30 INFO 6117 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting... 2023-06-30T17:46:18.591+05:30 INFO 6117 --- [ main] com.zaxxer.hikari.pool.HikariPool : HikariPool-1 - Added connection conn0: url=jdbc:h2:mem:d...