fix: clean up code and add canonical url

apps/web/src/app/page.tsx

@@ -1,6 +1,14 @@
 import { Hero } from "@/components/landing/hero";
 import { Header } from "@/components/header";
 import { Footer } from "@/components/footer";
+import type { Metadata } from "next";
+import { SITE_URL } from "@/constants/site";
+
+export const metadata: Metadata = {
+  alternates: {
+    canonical: SITE_URL,
+  },
+};
 
 export default async function Home() {
   return (