chore(build): try to build demo and docs (#3434)

platform/app/src/routes/PrivateRoute.tsx

@@ -0,0 +1,14 @@
+import React from 'react';
+import { useUserAuthentication } from '@ohif/ui';
+
+export const PrivateRoute = ({ children, handleUnauthenticated }) => {
+  const [{ user, enabled }] = useUserAuthentication();
+
+  if (enabled && !user) {
+    return handleUnauthenticated();
+  }
+
+  return children;
+};
+
+export default PrivateRoute;