include variable path to keycloak data folder

docker-compose-keycloak.yml

@@ -12,7 +12,7 @@ services:
             - POSTGRES_PASSWORD=postgres
             - POSTGRES_DB=keycloak
         volumes:
-            - ./keycloak-data:/var/lib/postgresql/data
+            - ${keycloak_data_folder}:/var/lib/postgresql/data
         networks:
             - keycloak-net
         restart: always