feat: add Jupyter notebook for linear regression and CIFAR-10 image classification with model training

Dockerfile

@@ -4,13 +4,13 @@ FROM pytorch/pytorch:latest
 # 安装 Jupyter Lab 和常用库
 RUN pip config set global.index-url https://pypi.tuna.tsinghua.edu.cn/simple && \
     pip install --upgrade pip && \
-    pip install jupyterlab matplotlib pandas seaborn
+    pip install jupyterlab matplotlib pandas seaborn tensorboard visdom
 
 # 设置默认工作目录
 WORKDIR /workspace
 
-# 暴露 Jupyter 端口
-EXPOSE 8888
+# 暴露端口：Jupyter、TensorBoard、Visdom
+EXPOSE 8888 6006 8097
 
 # 默认启动 Jupyter Lab
 CMD ["jupyter", "lab", "--ip=0.0.0.0", "--port=8888", "--no-browser", "--allow-root"]