build: 配置构建代理以加速依赖下载

- 修改 install-php-extensions 脚本中的资源地址，使用内部代理
- 配置 Composer 使用内部镜像源替代阿里云镜像
- 优化 Docker 层缓存：合并 composer 文件拷贝和依赖安装步骤

Dockerfile

@@ -12,6 +12,11 @@ RUN apt-get install -y nginx
 
 ADD --chmod=0755 https://nexus.hl7.top:1243/repository/github-raw-proxy/mlocati/docker-php-extension-installer/releases/latest/download/install-php-extensions /usr/local/bin/
 
+# 配置代理
+RUN sed -i 's|aomedia.googlesource.com|nexus.hl7.top:1243/repository/raw-aomedia.googlesource.com|g' /usr/local/bin/install-php-extensions
+RUN sed -i 's|chromium.googlesource.com|nexus.hl7.top:1243/repository/raw-chromium.googlesource.com|g' /usr/local/bin/install-php-extensions
+RUN sed -i 's|https://github.com|https://nexus.hl7.top:1243/repository/github-raw-proxy|g' /usr/local/bin/install-php-extensions
+
 RUN install-php-extensions pdo_mysql
 RUN install-php-extensions gd
 RUN install-php-extensions fileinfo
@@ -37,12 +42,15 @@ WORKDIR /var/www/html
 
 # 安装 Composer
 COPY --from=composer:2 /usr/bin/composer /usr/local/bin/composer
+RUN chmod +x /usr/local/bin/composer
+RUN composer config -g repos.packagist composer https://nexus.hl7.top:1243/repository/composer-proxy/
 
-# 复制 composer.json 并安装依赖
-COPY composer.json /var/www/html/
-# 配置 composer 镜像源并安装依赖
-RUN composer config -g repos.packagist composer https://mirrors.aliyun.com/composer/ \
-    && composer install --no-dev --no-interaction --no-scripts --no-autoloader
+# 设置工作目录
+WORKDIR /var/www/html
+
+# 预先拷贝 composer 文件并安装依赖，利用 Docker 缓存
+COPY composer.json composer.lock /var/www/html/
+RUN composer install --no-dev --no-interaction --no-scripts --no-autoloader
 
 # 将当前目录下的文件拷贝到工作目录
 COPY . /var/www/html