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Dockerfile

@@ -21,12 +21,16 @@ RUN apt-get update -o Acquire::Retries=10 -o Acquire::http::Timeout=30 && \
     gcc \
     g++ \
     make && \
-    rm -rf /var/lib/apt/lists/* && \
-    ln -sf /usr/bin/python3.9 /usr/bin/python3
+    rm -rf /var/lib/apt/lists/*
 
-# Upgrade pip and install MkDocs and plugins
+# Configure pip to use a reliable mirror and increase timeouts
 RUN python3 -m pip install --no-cache-dir --upgrade pip && \
-    pip install --no-cache-dir \
+    pip config set global.index-url https://mirrors.tuna.tsinghua.edu.cn/pypi/web/simple && \
+    pip config set install.timeout 60 && \
+    pip config set install.retries 5
+
+# Install MkDocs and plugins
+RUN pip install --no-cache-dir \
     mkdocs==1.6.1 \
     mkdocs-material==9.5.39 \
     mkdocs-macros-plugin==1.2.0 \