title: SAP Spartacus: Fallback handler if no base site matches URL
body: <p>We have configured multiple base sites in our setup, with different URL Patterns as matchers (think of &quot;/&lt;country/&quot;, where different countries are mapped to different base stores). This works so far. But if a user enters the URL without a country part (for example just &quot;/&quot; as path), it will just show an empty page. The following error will be thrown in the browsers console:</p>
  <pre><code>Error: Uncaught (in promise): Error: Error: Cannot get base site config! Current url (https://some-host.example.com/) doesn't match any of url patterns of any base sites.
  </code></pre>
  <p>Is there any way to register a handler to handle this case correctly? e.g. redirect the User to some base site</p>