定制ubuntu:18.04，修改了时区为Asia/Shanghai；修改本地编码为zh_CN.UTF-8

.gitignore

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+/.idea/

ubuntu/18.04.Dockerfile

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+FROM arm64v8/ubuntu:18.04
+
+ENV TZ Asia/Shanghai
+
+RUN  sed -i "s/ports.ubuntu.com/mirrors.aliyun.com/g" /etc/apt/sources.list \
+     && apt-get update && apt-get upgrade -y \
+     && apt -y install language-pack-zh-hans tzdata \
+     && ln -snf /usr/share/zoneinfo/TZ /etc/localtime && echo TZ > /etc/timezone \
+     && dpkg-reconfigure -f noninteractive tzdata \
+     && apt-get clean \
+     && rm -rf /tmp/* /var/cache/* /usr/share/doc/* /usr/share/man/* /var/lib/apt/lists/*
+
+ENV LANG zh_CN.UTF-8
+ENV LANGUAGE zh_CN:zh
+ENV LC_ALL zh_CN.UTF-8
+
+# docker build . -t pi4k8s/ubuntu:18.04 -f 18.04.Dockerfile