Gate testing API for staging E2E

app/Http/Middleware/EnsureE2ETestingAccess.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use Closure;
+use Illuminate\Http\Request;
+use Symfony\Component\HttpFoundation\Response;
+
+class EnsureE2ETestingAccess
+{
+    public function handle(Request $request, Closure $next): Response
+    {
+        if (! config('e2e.testing_enabled')) {
+            abort(404);
+        }
+
+        $token = config('e2e.testing_token');
+        if ($token && $request->header('X-Testing-Token') !== $token) {
+            abort(404);
+        }
+
+        return $next($request);
+    }
+}