chore(database): configure database settings

[LauriESB]

This pull request configures the PostgreSQL database settings in the application.properties file. The following properties were added:

spring.datasource.url=jdbc:postgresql://localhost:5432
spring.datasource.username=postgres
spring.datasource.password=12122002
spring.jpa.database-platform=org.hibernate.dialect.PostgreSQLDialect
spring.jpa.hibernate.ddl-auto=create-drop
spring.jpa.show-sql=true

These changes establish the connection to a local PostgreSQL database, set the dialect for Hibernate, and enable SQL logging for debugging purposes.