Updates to use newest alpha release with on-request image optimization during --serve. Cleans up config and data

content/feed/feed.11tydata.js

@@ -1,3 +1,3 @@
 export default {
-	eleventyExcludeFromCollections: true
-}
+	layout: false,
+};

content/feed/feed.njk

@@ -1,6 +1,9 @@
 ---
 # Metadata comes from _data/metadata.js
 permalink: /feed/feed.xml
+eleventyNavigation:
+  key: Feed
+  order: 3
 ---
 <?xml version="1.0" encoding="utf-8"?>
 <feed xmlns="http://www.w3.org/2005/Atom" xml:base="{{ metadata.language }}">