Add rel links to sitemap and rss feed in blog starter kit

examples/blog/src/components/BaseHead.astro

@@ -2,6 +2,7 @@
 // Import the global.css file here so that it is included on
 // all pages through the use of the <BaseHead /> component.
 import '../styles/global.css';
+import { SITE_TITLE } from '../consts';
 
 interface Props {
 	title: string;
@@ -18,6 +19,8 @@ const { title, description, image = '/blog-placeholder-1.jpg' } = Astro.props;
 <meta charset="utf-8" />
 <meta name="viewport" content="width=device-width,initial-scale=1" />
 <link rel="icon" type="image/svg+xml" href="/favicon.svg" />
+<link rel="sitemap" href="/sitemap-index.xml" />
+<link rel="alternate" type="application/rss+xml" title={SITE_TITLE} href={new URL("rss.xml", Astro.site)} />
 <meta name="generator" content={Astro.generator} />
 
 <!-- Font preloads -->