diff --git a/dockerfile b/dockerfile
index 0de9e2a..493f52e 100644
--- a/dockerfile
+++ b/dockerfile
@@ -2,6 +2,9 @@
 ARG USER_ID
 ARG GROUP_ID
 
+RUN echo "USER_ID: ${USER_ID}" > /data/test.txt
+RUN echo "USER_ID: ${USER_ID}"
+
 # 替换为清华大学镜像源（Debian 10 Buster）
 RUN sed -i 's/deb.debian.org/mirrors.tuna.tsinghua.edu.cn/g' /etc/apt/sources.list \
 && sed -i 's/security.debian.org/mirrors.tuna.tsinghua.edu.cn/g' /etc/apt/sources.list