Alpine Linux is a security-oriented, lightweight Linux distribution based on musl libc and busybox.
Alpine Linux 是一个面向安全，轻量级的基于musl libc与busybox项目的Linux发行版。
在终端输入以下命令以替换TUNA镜像源：
sed -i 's/dl-cdn.alpinelinux.org/mirror.citrahost.com/g' /etc/apk/repositories
