fix: update redirect configuration for custom domain compatibility

Adjusted `pathSegmentsToKeep` to 0 in 404.html since we're now using a custom domain. This ensures
URL paths are correctly redirected on GitHub Pages, preserving single-page app functionality without
breaking the root path structure.

public/404.html

@@ -22,7 +22,7 @@
     // https://username.github.io/repo-name/one/two?a=b&c=d#qwe becomes
     // https://username.github.io/repo-name/?/one/two&a=b~and~c=d#qwe
     // Otherwise, leave pathSegmentsToKeep as 0.
-    var pathSegmentsToKeep = 1;
+    var pathSegmentsToKeep = 0;
 
     var l = window.location;
     l.replace(