Add RSS feed, add links for direct md editing on GitHub and update favicon

src/pages/rss.xml.js

@@ -0,0 +1,23 @@
+import rss from "@astrojs/rss";
+import { getCollection } from "astro:content";
+import sanitizeHtml from "sanitize-html";
+import MarkdownIt from "markdown-it";
+const parser = new MarkdownIt();
+
+export const GET = async (context) => {
+  const blog = await getCollection("blog");
+  return rss({
+    title: "Thilo Hohlt’s Blog",
+    description: "Thilo Hohlt’s Blog",
+    site: context.site,
+    trailingSlash: false,
+    stylesheet: "pretty-feed-v3.xsl",
+    items: blog.map((article) => ({
+      link: `/blog/${article.id}/`,
+      content: sanitizeHtml(parser.render(article.body), {
+        allowedTags: sanitizeHtml.defaults.allowedTags.concat(["img"]),
+      }),
+      ...article.data,
+    })),
+  });
+};