更新

backend/app/controller/Index.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace app\controller;
+
+use app\BaseController;
+
+class Index extends BaseController
+{
+    public function index()
+    {
+        return $this->serveSpa('index.html');
+    }
+
+    private function serveSpa(string $file)
+    {
+        $path = rtrim(public_path($file), '/\\');
+        if (!is_file($path)) {
+            return response('前端尚未编译，请在项目根目录执行 npm run build', 503, [
+                'Content-Type' => 'text/plain; charset=utf-8',
+            ]);
+        }
+
+        return response(file_get_contents($path), 200, [
+            'Content-Type' => 'text/html; charset=utf-8',
+        ]);
+    }
+}