added initial blog tryings

apps/blog/src/pages/rss.xml.js

@@ -0,0 +1,16 @@
+import rss from '@astrojs/rss';
+import { getCollection } from 'astro:content';
+import { SITE_TITLE, SITE_DESCRIPTION } from '../consts';
+
+export async function GET(context) {
+	const posts = await getCollection('blog');
+	return rss({
+		title: SITE_TITLE,
+		description: SITE_DESCRIPTION,
+		site: context.site,
+		items: posts.map((post) => ({
+			...post.data,
+			link: `/blog/${post.id}/`,
+		})),
+	});
+}