update config

Author: ohdoking

src/main/resources/application.properties

@@ -1,6 +1,8 @@
 spring.datasource.url=${DB_URL}
 spring.datasource.username=${DB_USERNAME}
 spring.datasource.password=${DB_PASSWORD}
+spring.datasource.driver-class-name=org.postgresql.Driver
+spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.PostgreSQLDialect
 spring.jpa.hibernate.ddl-auto=update
 management.endpoints.web.base-path=/
 management.endpoints.web.exposure.include=health