use PROXY_ADDRESS_FORWARDING instead of KEYCLOAK_FRONTEND_URL in a load balanced environment

• it will redirect auth and auth/ correctly to keycloak frontend

deployment/docker-compose.yml

@@ -80,7 +80,7 @@ services:
       DB_PASSWORD_FILE: /run/secrets/keycloak_database_password
       KEYCLOAK_USER_FILE: /run/secrets/keycloak_admin_user
       KEYCLOAK_PASSWORD_FILE: /run/secrets/keycloak_admin_password
-      KEYCLOAK_FRONTEND_URL: ${HOST_PROTOCOL}${HOST_NAME}/auth
+      PROXY_ADDRESS_FORWARDING: 'true'
     depends_on:
       - keycloak_postgres
     secrets:
@@ -194,7 +194,6 @@ services:
       - "traefik.http.routers.${COMPOSE_PROJECT_NAME}-mkdocs.tls=true"
 
 volumes: 
-  postgres_data:
   keycloak_data:
   backend_data:
   grafana_data: