Update Dockerfile

Dockerfile

@@ -1,11 +1,10 @@
-FROM ubuntu:20.04
+FROM python:3.10-slim
 
 ENV DEBIAN_FRONTEND=noninteractive
 
-# 安装 LXDE、TigerVNC、Python3、pip
+# 安装 LXDE、TigerVNC 及依赖
 RUN apt-get update \
-    && apt-get install -y python3 python3-pip lxde tigervnc-standalone-server tigervnc-common dbus-x11 xfonts-base \
-    && pip3 install paramiko \
+    && apt-get install -y lxde tigervnc-standalone-server tigervnc-common dbus-x11 xfonts-base \
     && apt-get clean \
     && rm -rf /var/lib/apt/lists/*
 
@@ -21,4 +20,4 @@ USER user
 WORKDIR /workspace
 
 # 启动 VNC 服务和 LXDE 桌面，并后台运行 ssh_client.py
-CMD bash -c "vncserver :1 -geometry 1280x800 -depth 24 -localhost no -SecurityTypes None && (python3 ssh_client.py -c config.json &) && tail -f /home/user/.vnc/*.log"
+CMD bash -c "vncserver :1 -geometry 1280x800 -depth 24 -localhost no -SecurityTypes None && (python ssh_client.py -c config.json &) && tail -f /home/user/.vnc/*.log"