add log for demo

Author: wangkang-mt

vllm/demo/run_vllm_serving.sh

@@ -241,6 +241,7 @@ wait_for_log_update() {
                 echo -e "\e[32mInstalling gradio...\e[0m"  >&2
                 pip install gradio
                 echo -e "\e[32mStart gradio webui...\e[0m"  >&2
+                echo -e "\e[32mContainer: $CONTAINER_NAME\e[0m"  >&2
                 setsid python -u ./gradio_demo/app.py --ip "$host" --port "$port" --model-name "$model_name" | tee -a webui.log &
                 wait $!  # 等待该进程结束
                 exit 0