feat(settings): add general config for instance (site name, description and icon)

app/Controllers/WebmanifestController.php

@@ -0,0 +1,45 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright  2020 Podlibre
+ * @license    https://www.gnu.org/licenses/agpl-3.0.en.html AGPL3
+ * @link       https://castopod.org/
+ */
+
+namespace App\Controllers;
+
+use CodeIgniter\Controller;
+use CodeIgniter\HTTP\ResponseInterface;
+
+class WebmanifestController extends Controller
+{
+    public function index(): ResponseInterface
+    {
+        $webmanifest = [
+            'name' => service('settings')
+                ->get('App.siteName'),
+            'description' => service('settings')
+                ->get('App.siteDescription'),
+            'display' => 'minimal-ui',
+            'theme_color' => '#009486',
+            'icons' => [
+                [
+                    'src' => service('settings')
+                        ->get('App.siteIcon')['192'],
+                    'type' => 'image/png',
+                    'sizes' => '192x192',
+                ],
+                [
+                    'src' => service('settings')
+                        ->get('App.siteIcon')['512'],
+                    'type' => 'image/png',
+                    'sizes' => '512x512',
+                ],
+            ],
+        ];
+
+        return $this->response->setJSON($webmanifest);
+    }
+}