Added unauthorizedpage and path in main

frontend/src/Pages/UnauthorizedPage.tsx

@@ -0,0 +1,18 @@
+import Button from "../Components/Button";
+
+export default function UnauthorizedPage(): JSX.Element {
+  return (
+    <div className="flex flex-col items-center justify-center min-h-screen bg-white">
+      <h1 className="text-[30px]">Unauthorized</h1>
+      <a href="/">
+        <Button
+          text="Go to Home Page"
+          onClick={(): void => {
+            localStorage.clear();
+          }}
+          type="button"
+        />
+      </a>
+    </div>
+  );
+}