讲下面这段拷贝到 Dockerfile 中即可
### change the system source for installing libs
ARG USE_SRC_INSIDE=true
RUN if [ ${USE_SRC_INSIDE} == true ] ; \
then \
sed -i s/archive.ubuntu.com/mirrors.aliyun.com/g /etc/apt/sources.list ; \
sed -i s/security.ubuntu.com/mirrors.aliyun.com/g /etc/apt/sources.list ; \
echo "Use aliyun source for installing libs" ; \
else \
echo "Keep the download source unchanged" ; \
fi
