Problem in root route in laravel 8 Using illuminate

This is my first time asking questions in StackOverflow so sorry for the mistakes. I have a problem with laravel routes.

    <?php
use Illuminate\Support\Facades\Route;
//start :: login
Route::group(['namespace' => 'auth'], function () {
    Route::get('/', 'AuthController@index')->name('index');
    Route::get('/showResult', 'AuthController@Result')->name('Result');
    Route::post('/showResultds', 'AuthController@showResult')->name('showResult');
    Route::post('/dologin', 'AuthController@doLogin')->name('doLogin');
    Route::get('/logout', 'AuthController@logout')->name('logout');

So these are my routes. I have determined the app URL correctly in .env file.

My problem is that when my website is on the server (windows server) the route becomes the server's local IP address and not my domain or public IP address. When I click on my links it becomes 172.30.30.4/login for example. and not domainname.com/login

Thanks for your help