feat: add canonical and alternate links for SEO optimization in AnnuncioDettaglio

apps/infoalloggi/src/pages/annuncio/[cod].tsx

@@ -99,6 +99,17 @@ const AnnuncioDettaglio: NextPage<AnnuncioProps> = ({
 					property="og:logo"
 				/>
 				<meta content="Infoalloggi.it" property="og:site_name" />
+				<link href={meta?.ogUrl || ""} rel="canonical" />
+				<link
+					href={`${env.NEXT_PUBLIC_BASE_URL}/annuncio/${cod}`}
+					hrefLang="it"
+					rel="alternate"
+				/>
+				<link
+					href={`${env.NEXT_PUBLIC_BASE_URL}/en/annuncio/${cod}`}
+					hrefLang="en"
+					rel="alternate"
+				/>
 			</Head>
 			<AnnuncioView cod={cod} flag={flag} />
 		</main>