chug chug, working on post formatting and tag pages

src/meta/404.md

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+---
+layout: page.njk
+permalink: 404.html
+eleventyExcludeFromCollections: true
+---
+
+# Sorry, can't find that
+
+Head [home](/).

src/meta/feed.xml

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+---
+permalink: feed.xml
+eleventyExcludeFromCollections: true
+---
+<?xml version="1.0" encoding="utf-8"?>
+<feed xmlns="http://www.w3.org/2005/Atom" xml:lang="{{ metadata.language or page.lang }}">
+  <title>{{ metadata.title }}</title>
+  <subtitle>{{ metadata.description }}</subtitle>
+  <link href="{{ permalink | htmlBaseUrl(metadata.base) }}" rel="self" />
+  <link href="{{ metadata.base | addPathPrefixToFullUrl }}" />
+  <updated>{{ collections.posts | getNewestCollectionItemDate | dateToRfc3339 }}</updated>
+  <id>{{ metadata.base | addPathPrefixToFullUrl }}</id>
+  <author>
+    <name>{{ metadata.author.name }}</name>
+  </author>
+  {%- for post in collections.posts | reverse %}
+  {%- set absolutePostUrl %}{{ post.url | htmlBaseUrl(metadata.base) }}{% endset %}
+  <entry>
+    <title>{{ post.data.title }}</title>
+    <link href="{{ absolutePostUrl }}" />
+    <updated>{{ post.date | dateToRfc3339 }}</updated>
+    <id>{{ absolutePostUrl }}</id>
+    <content type="html">{{ post.content | renderTransforms(post.data.page, metadata.base) }}</content>
+  </entry>
+  {%- endfor %}
+</feed>

src/meta/sitemap.xml

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+---
+permalink: sitemap.xml
+eleventyExcludeFromCollections: true
+---
+<?xml version="1.0" encoding="utf-8"?>
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:xhtml="http://www.w3.org/1999/xhtml">
+{% for page in collections.all %}
+	{% if page.data.permalink != false %}
+		{% set absoluteUrl %}{{ page.url | htmlBaseUrl(metadata.url) }}{% endset %}
+		<url>
+			<loc>{{ absoluteUrl }}</loc>
+			<lastmod>{{ page.date | htmlDateString }}</lastmod>
+		</url>
+	{% endif %}
+{% endfor %}
+</urlset>