Update landing page, fix hardcoded values

resources/views/site/index.blade.php

@@ -123,8 +123,10 @@
                         </div>
                         <div class="card shadow-none border card-body">
                             <p class="text-center mb-0 font-weight-bold small">
+                                @if(config('pixelfed.open_registration'))
                                 <a href="/register">Register</a>
                                 <span class="px-1">·</span>
+                                @endif
                                 <a href="/password/reset">Password Reset</a>
                             </p>
                         </div>