project: update apt-get source of cn

Dockerfile

@@ -13,8 +13,10 @@ RUN pip install -i https://pypi.tuna.tsinghua.edu.cn/simple pipenv
 # 安装依赖，同样使用临时的镜像源
 RUN pipenv install --deploy --ignore-pipfile -i https://pypi.tuna.tsinghua.edu.cn/simple
 
-# 安装 wget
-RUN apt-get update && apt-get install -y wget
+# 设置清华大学镜像源以加速安装
+RUN sed -i 's/deb.debian.org/mirrors.tuna.tsinghua.edu.cn/g' /etc/apt/sources.list \
+    && sed -i 's/security.debian.org/mirrors.tuna.tsinghua.edu.cn/g' /etc/apt/sources.list \
+    && apt-get update && apt-get install -y wget
 
 # 拷贝应用代码
 COPY . /app