1、进入容器docker exec -it php /bin/bash
2、查看php当前模块php -m
3、安装依赖包apt-get install libwebp-dev libjpeg-dev libpng-dev zlib1g-dev libfreetype6-dev libjpeg62-turbo-dev
4、添加GD库编译选项docker-php-ext-configure gd --with-jpeg-dir=/usr/include/
5、安装gd、exif模块docker-php-ext-install gd
6、安装exif模块docker-php-ext-install exif
7、重启容器exit
docker restart php
docker restart nginx
8、查看phpinfo
出现gd模块，并且有：
JPEG Support：enabled
libJPEG Version：6b