update README.md

LTaooo · LTaooo · commit 6f6154bf9607 · 2023-09-09T11:42:20.000+08:00
diff --git a/README.md b/README.md
@@ -22,6 +22,10 @@
     composer require microphp/swoole
 ```
 
+1. 修改.env中驱动
+    ```dotenv
+      SERVER_DRIVER=swoole
+
 ### 运行
 ```shell
   php bin/console start
