Feat: containerize the app using docker, change db to postgresql

core/src/main/resources/application.properties

-spring.h2.console.enabled=true
\ No newline at end of file
+##spring.h2.console.enabled=true
+spring.datasource.url=jdbc:postgresql://localhost:5432/postgres
+spring.datasource.username=postgres
+spring.datasource.password=password
+spring.jpa.hibernate.ddl-auto=create
\ No newline at end of file