[REFACTOR] changed app dev db properties to localhost

.env

-DB_URL=jdbc:postgresql://localhost:5432/be-authentication
-DB_USERNAME=postgres
-DB_PASSWORD=postgres

src/main/resources/application-dev.properties

 spring.application.name=authentication
 
-spring.datasource.url=${DB_URL}
-spring.datasource.username=${DB_PASSWORD}
-spring.datasource.password=${DB_PASSWORD}
+spring.datasource.url=jdbc:postgresql://localhost:5432/be-authentication
+spring.datasource.username=postgres
+spring.datasource.password=postgres
 
 spring.datasource.driver-class-name=org.postgresql.Driver
 spring.jpa.database-platform=org.hibernate.dialect.PostgreSQLDialect