database configuration

src/main/resources/application.properties

+spring.datasource.url=jdbc:mysql://localhost:3306/memorybox?useUnicode=yes&characterEncoding=UTF-8
+spring.datasource.username=memory
+spring.datasource.password=memory
+
+spring.jpa.hibernate.ddl-auto=create-drop
+
+spring.session.store-type=jdbc