fix: add gradle wrapper and enable env vars

src/main/resources/application-prod.properties

@@ -5,17 +5,23 @@ spring.application.name=jambotron
 server.port=8081
 #============Localhost Configurations========================
 
-spring.datasource.url= jdbc:postgresql://localhost:5432/jambotronDB
-spring.datasource.username= admin
-spring.datasource.password= postgrespw
+#spring.datasource.url= jdbc:postgresql://localhost:5432/jambotronDB
+#spring.datasource.username= admin
+#spring.datasource.password= postgrespw
 
 spring.flyway.baseline-on-migrate=true
 spring.flyway.validate-on-migrate=true
 
-spring.flyway.url=jdbc:postgresql://localhost:5432/jambotronDB
-spring.flyway.user=admin
-spring.flyway.password=postgrespw
+#spring.flyway.url=jdbc:postgresql://localhost:5432/jambotronDB
+#spring.flyway.user=admin
+#spring.flyway.password=postgrespw
 
+spring.datasource.url=${SPRING_DATASOURCE_URL}
+spring.datasource.username=${SPRING_DATASOURCE_USERNAME}
+spring.datasource.password=${SPRING_DATASOURCE_PASSWORD}
+spring.flyway.url=${SPRING_FLYWAY_URL}
+spring.flyway.user=${SPRING_FLYWAY_USER}
+spring.flyway.password=${SPRING_FLYWAY_PASSWORD}
 
 #============Koyeb Configurations========================