diff --git a/Dockerfile b/Dockerfile
index f73830c..74a84a1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -14,6 +14,7 @@ ARG PROXY
 
 # 安装基础工具与配置文件
 RUN echo "安装基础工具与配置文件" && \
+    echo ${PROXY} && \
     export http_proxy=${PROXY} && \
     export https_proxy=${PROXY} && \
     apt-get update  && \