use host

app/Http/Controllers/MainController.php

         $rsvp = RSVP::all();
         $guestbook = GuestBook::all();
 
-        $currentUrl = $request->fullUrl();
-        if ($currentUrl == 'https://aliffayuna.com/') {
+        $host = $request->getHost();
+        if ($host == 'aliffayuna.com') {
             return view('digital-card', compact(['rsvp', 'guestbook']));
         }
 
-        if ($currentUrl == 'https://rsvp.aliffayuna.com/') {
+        if ($host == 'rsvp.aliffayuna.com') {
             return view('rsvp-digital-card');
         }
     }