php:5.6-apache Docker镜像中安装 gd mysqli 库 【亲测可用】

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/*