feat(docker): añadir Dockerfile para contenerizar la aplicación

src/auth/PrivateRoute.tsx

@@ -0,0 +1,21 @@
+import { Navigate, Outlet, useLocation } from 'react-router-dom';
+import { useAuth } from './AuthContext';
+
+export function PrivateRoute() {
+  const { isAuthenticated, isLoading } = useAuth();
+  const location = useLocation();
+
+  if (isLoading) {
+    return (
+      <div className="flex min-h-screen items-center justify-center bg-surface">
+        <div className="h-10 w-10 animate-spin rounded-full border-2 border-accent border-t-transparent" />
+      </div>
+    );
+  }
+
+  if (!isAuthenticated) {
+    return <Navigate to="/login" state={{ from: location }} replace />;
+  }
+
+  return <Outlet />;
+}