v5.0.0 update

app/Http/Controllers/V1/Installation/FilePermissionsController.php

@@ -0,0 +1,39 @@
+<?php
+
+namespace Crater\Http\Controllers\V1\Installation;
+
+use Crater\Http\Controllers\Controller;
+use Crater\Space\FilePermissionChecker;
+use Illuminate\Http\JsonResponse;
+
+class FilePermissionsController extends Controller
+{
+    /**
+     * @var PermissionsChecker
+     */
+    protected $permissions;
+
+    /**
+     * @param PermissionsChecker $checker
+     */
+    public function __construct(FilePermissionChecker $checker)
+    {
+        $this->permissions = $checker;
+    }
+
+    /**
+     * Display the permissions check page.
+     *
+     * @return JsonResponse
+     */
+    public function permissions()
+    {
+        $permissions = $this->permissions->check(
+            config('installer.permissions')
+        );
+
+        return response()->json([
+            'permissions' => $permissions,
+        ]);
+    }
+}