1、设置源

sed -i "s@http://deb.debian.org@http://mirrors.aliyun.com@g" /etc/apt/sources.list && rm -Rf /var/lib/apt/lists/* &&  cat /etc/apt/sources.list

2、安装扩展

apt-get update -y && apt-get install -y libwebp-dev libjpeg62-turbo-dev libpng-dev libxpm-dev \
    libfreetype6-dev
apt-get install -y \
        zlib1g-dev 
docker-php-ext-install mbstring
apt-get install -y libzip-dev
docker-php-ext-install zip
docker-php-ext-configure gd --with-webp --with-jpeg --with-xpm --with-freetype
docker-php-ext-install gd