说明：  前言 只有光头才能变强。 文本已收录至我的GitHub仓库,欢迎估计大家也可能听过Docker这项技术(在论坛上、招聘技能上、交流群上等等)
(FROM ubuntu:bionic # add our user and group first to make sure their IDs get assigned consistently, regardless of whatever dependencies get added RUN groupadd -r mysql && useradd -r -g mysql mysql # https://bugs.debian.org/830696 (apt uses gpgv by default in newer releases, rather than gpg))