Everything run from this file

frontend/src/Pages/App.tsx

@@ -0,0 +1,20 @@
+import { useState } from "react";
+
+import LoginPage from "./LoginPage";
+import { useNavigate } from "react-router-dom";
+
+function App(): JSX.Element {
+  const navigate = useNavigate();
+  const [authority, setAuthority] = useState(0);
+  if (authority === 1) {
+    navigate("/admin");
+  } else if (authority === 2) {
+    navigate("/pm");
+  } else if (authority === 3) {
+    navigate("/user");
+  }
+
+  return <LoginPage setAuthority={setAuthority} />;
+}
+
+export default App;