基于乌班图的标准镜像添加中文支持

Dockerfile如下：

FROM ubuntu:16.10
ENV TZ=Asia/Shanghai
RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
RUN locale-gen zh_CN.UTF-8 && \
  DEBIAN_FRONTEND=noninteractive dpkg-reconfigure locales
RUN locale-gen zh_CN.UTF-8
ENV LANG zh_CN.UTF-8
ENV LANGUAGE zh_CN:zh
ENV LC_ALL zh_CN.UTF-8