Update Dockerfile

Dockerfile

@@ -1,7 +1,12 @@
-# 使用CentOS镜像作为基础镜像
-FROM centos:latest
-RUN yum -y install sudo passwd
-RUN useradd -m -u 1001 admin
+FROM debian:latest
+ARG DEBIAN_FRONTEND=noninteractive
+RUN apt-get update && apt-get install -y passwd
+RUN useradd -m -u 1001 -s /bin/bash admin
 RUN echo 'admin:pass' | chpasswd
+RUN apt-get clean && rm -rf /var/lib/apt/lists/*
+
+
+USER admin
 WORKDIR /home/admin
-CMD whoami
+
+CMD whoami && pwd