新增api应用模块

app/api/controller/Index.php

@@ -0,0 +1,19 @@
+<?php
+declare (strict_types = 1);
+
+namespace app\api\controller;
+use app\api\BaseController;
+
+
+class Index extends BaseController
+{
+    public function index()
+    {
+        return '后端运行中...';
+    }
+
+    public function hello($name = 'ThinkPHP8')
+    {
+        return 'hello,' . $name;
+    }
+}