php 镜像构建 apt 源切换阿里云镜像（deb.debian.org 从 ECS 超时）

docker/php/Dockerfile

@@ -6,6 +6,8 @@ FROM ${COMPOSER_IMAGE} AS composer
 FROM ${PHP_BASE_IMAGE}
 
 RUN set -eux; \
+    # 国内 ECS 访问 deb.debian.org（Fastly）易超时，apt 源切换到阿里云镜像站
+    sed -i 's|deb.debian.org|mirrors.aliyun.com|g' /etc/apt/sources.list; \
     apt-get update && apt-get install -y --no-install-recommends \
         libfreetype6-dev \
         libjpeg62-turbo-dev \