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web/README.md

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+### 完全卸载删除站点及环境
+- 删除站点文件
+```
+sudo rm -r /var/www/
+```
+
+- 停止相关服务
+```
+sudo systemctl stop caddy apache2 mariadb
+```
+
+- 禁用开机自启
+```
+sudo systemctl disable caddy apache2 mariadb
+```
+
+- 卸载软件包
+```
+sudo apt remove --purge caddy apache2 php* mariadb-server mariadb-client -y
+```
+
+- 清理残留配置和依赖
+```
+sudo apt autoremove -y
+```