修改docker相关配置，支持通过.env文件传入变量

.env.example

@@ -0,0 +1,24 @@
+# 项目配置, 请根据实际情况修改
+PROJECT_NAME=newshop
+
+# PHP/PHP-FPM 配置
+PHP_VERSION=7.4
+PHP_FPM_VERSION=7.4-fpm
+PHP_FPM_PORT=9000
+XDEBUG_POST=9003
+
+# 数据库配置
+MYSQL_ROOT_HOST=%
+MYSQL_DATABASE=shop_mallnew
+MYSQL_USER=shop_mallnew
+MYSQL_PASSWORD=shop_mallnew
+MYSQL_PORT=3306
+
+# Redis 配置
+REDIS_PASSWORD=luckyshop123!@#
+REDIS_PORT=6379
+
+# Nginx 配置
+NGINX_PORT=80
+NGINX_SSL_PORT=443
+