~~~ { "dns": ["202.96.209.5","8.8.8.8"] } ~~~ 重启Docker服务，命令： ``` systemctl daemon-reload systemctl restart docker ``` 解决 docker apt-get update 很慢 ``` FROM php:7.3-cli RUN sed -i s@/deb.debian.org/@/mirrors.aliyun.com/@g /etc/apt/sources.list \ && apt-get clean \ && apt-get update \ ```