add OPTIONS request handle

app/routes.php

@@ -13,12 +13,24 @@ header("Access-Control-Allow-Credentials: true");
 use Psr\Http\Message\ResponseInterface as Response;
 use Psr\Http\Message\ServerRequestInterface as Request;
 use Slim\App;
+use SLim\Exception\HttpNotFoundException;
 use gateway\UserGateway;
 use Config\Token;
 use Gateway\FileGateway;
 
 return function (App $app) {
+    $app->options('/{routes:.+}', function ($request, $response, $args) {
+        return $response;
+    });
 
+    $app->add(function ($request, $handler) {
+        $response = $handler->handle($request);
+        return $response
+                ->withHeader('Access-Control-Allow-Origin', '*')
+                ->withHeader('Access-Control-Allow-Headers', 'X-Requested-With, Content-Type, Accept, Origin, Authorization')
+                ->withHeader('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE, PATCH, OPTIONS');
+    });
+    
     $app->get('/', function (Request $req, Response $res) {
         $res->getBody()->write('SmartFit-API is working!');
         return $res;
@@ -227,4 +239,8 @@ return function (App $app) {
         if($code === -1) return $res->withStatus(500);
         return $res->withStatus(200);
     });
+
+    $app->map(['GET', 'POST', 'PUT', 'DELETE', 'PATCH'], '/{routes:.+}', function ($request, $response) {
+        throw new HttpNotFoundException($request);
+    });
 };