fixes for double nginx forward scenarios

docker-compose.yml

@@ -30,6 +30,7 @@ services:
       KMTN_CORS_ORIGINS: '["http://localhost:4200", "http://localhost"]'
       KMTN_ADMIN_USERNAME : "admin"
       KMTN_ADMIN_PASSWORD : "123"
+      KMTN_STATIC_UPSTREAM_URL: http://frontend:80
     ports:
       - "8000:8000"
     volumes: