chore: change prod db config

Author: thgosi

src/main/resources/application-prod.yml

@@ -1,8 +1,3 @@
 spring:
-  datasource:
-    driver-class-name: org.postgresql.Driver
-    password: ${DB_PASSWORD:backend}
-    url: jdbc:postgresql://${DB_HOST:localhost}/${DB_NAME:backend-db}
-    username: ${DB_USERNAME:backend}
   devtools:
     add-properties: false