Access Slim Framework 4 as Subfolder - slim

Question

I am trying to build an api with SLIM Framework V4.
htdocs/slim/public/index.php
<?php
require __DIR__ . '/../vendor/autoload.php';
use DI\Container;
use Slim\Factory\AppFactory;
use Illuminate\Pagination\Paginator;
use App\Middlewares\RequestUser;
use Psr\Http\Message\ResponseInterface as Response;
use Psr\Http\Message\ServerRequestInterface as Request;
// Create Container using PHP-DI
$container = new Container();
// Set container to create App with on AppFactory
AppFactory::setContainer($container);
$app = AppFactory::create();
$app->options('/{routes:.+}', function ($request, $response, $args) {
return $response;
});
$app->get('/', function (Request $request, Response $response, $args) {
$data = array('message' => 'Unauthorized access');
$payload = json_encode($data);
$response->getBody()->write($payload);
return $response
->withHeader('Content-Type', 'application/json')
->withStatus(201);
});
$app->run();
If i run php server, it works fine
G:\xampp\htdocs\slim\public> php -S localhost:8888
PHP 7.2.27 Development Server started at Sun Apr 19 18:42:11 2020
Listening on http://localhost:8888
Document root is G:\xampp\htdocs\slim\public
If i run
http://localhost/slim/public/
I am getting
Fatal error: Uncaught Slim\Exception\HttpMethodNotAllowedException: Method not allowed. Must be one of: OPTIONS in G:\xampp\htdocs\slim\vendor\slim\slim\Slim\Middleware\RoutingMiddleware.php:96 Stack trace: #0 G:\xampp\htdocs\slim\vendor\slim\slim\Slim\Routing\RouteRunner.php(72): Slim\Middleware\RoutingMiddleware->performRouting(Object(Slim\Psr7\Request)) #1 G:\xampp\htdocs\slim\vendor\slim\slim\Slim\MiddlewareDispatcher.php(81): Slim\Routing\RouteRunner->handle(Object(Slim\Psr7\Request)) #2 G:\xampp\htdocs\slim\vendor\slim\slim\Slim\App.php(211): Slim\MiddlewareDispatcher->handle(Object(Slim\Psr7\Request)) #3 G:\xampp\htdocs\slim\vendor\slim\slim\Slim\App.php(195): Slim\App->handle(Object(Slim\Psr7\Request)) #4 G:\xampp\htdocs\slim\public\index.php(37): Slim\App->run() #5 {main} thrown in G:\xampp\htdocs\slim\vendor\slim\slim\Slim\Middleware\RoutingMiddleware.php on line 96
htdocs
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^ index.php [QSA,L]
</IfModule>
I am working on windows 10, xampp v3.2.4
The production will be go daddy shared hosting, as a subfolder. I tested it as a subdomain on godaddy server it is working fine. But i need it to be a sub folder of main domain, as godaddy is charging SSL certificate for subdomain too.
Thanks for the help in advance.