add 国内源（阿里云）

Dockerfile

@@ -9,7 +9,8 @@ ENV PYTHONUNBUFFERED=1
 WORKDIR /app
 
 # Install system dependencies
-RUN apt-get update && apt-get install -y \
+RUN sed -i 's/deb.debian.org/mirrors.aliyun.com/g' /etc/apt/sources.list.d/debian.sources && \
+    apt-get update && apt-get install -y \
     gcc \
     default-libmysqlclient-dev \
     pkg-config \
@@ -17,7 +18,8 @@ RUN apt-get update && apt-get install -y \
 
 # Install python dependencies
 COPY requirements.txt /app/
-RUN pip install --upgrade pip && pip install -r requirements.txt && pip install gunicorn
+RUN pip config set global.index-url https://mirrors.aliyun.com/pypi/simple/ && \
+    pip install --upgrade pip && pip install -r requirements.txt && pip install gunicorn
 
 # Copy project
 COPY . /app/