Add aside with link to feeds

src/blog/tag.html

@@ -1,18 +1,32 @@
----
-title: Blog
-layout: base.njk
-pagination:
-    data: collections.tags
-    size: 1
-    alias: tag
-eleventyComputed:
-    permalink: "/post/tag/{{ tag }}/"
-    feed: "/post/tag/{{ tag }}/feed/"
+---json
+{
+    "title": "Blog",
+    "layout": "base.njk",
+    "pagination": {
+        "data": "collections.tags",
+        "size": 1,
+        "alias": "tag"
+    },
+    "eleventyComputed": {
+        "permalink": "/post/tag/{{ tag }}/",
+        "feed": {
+            "rss": "{{ page.url }}rss.xml",
+            "atom": "{{ page.url }}atom.xml",
+            "json": "{{ page.url }}feed.json"
+        }
+    }
+}
 ---
 
 <main class="wrapper-md stack-lg">
 <h1>Posts tagged “{{ tag }}”</h1>
 
+<aside class="text-center">
+    <p>
+        Subscribe via <a href="{{ feed.rss }}">RSS</a>, <a href="{{ feed.atom }}">Atom</a>, or <a href="{{ feed.json }}">JSON</a>.
+    </p>
+</aside>
+
 <ol class="stack-xl" role='list'>
     {% set posts = collections.posts | filterBy(tag) | reverse %}
     {% for item in posts %}