Dockerfile 代码如下：

FROM php:5.6-apache# 使用Debian归档源
RUN echo "deb http://archive.debian.org/debian stretch main contrib non-free" > /etc/apt/sources.list && \echo "deb http://archive.debian.org/debian-security stretch/updates main contrib non-free" >> /etc/apt/sources.list# 安装依赖（允许未验证的包）
RUN apt-get update && \apt-get install -y --allow-unauthenticated \libpng-dev \libjpeg-dev \libfreetype6-dev \&& docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-dir=/usr/include/ \&& docker-php-ext-install -j$(nproc) gd mysqli \&& apt-get clean \&& rm -rf /var/lib/apt/lists/*