Home page content, some more styling for headings & the page nav

src/blog/index.html

@@ -0,0 +1,4 @@
+---
+title: Blog
+layout: base.njk
+---

src/blog/posts/first-post.md

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+---
+title: My first post
+---
+
+Something something something
+
+## Something else
+
+Some content in here
+
+### A sub-subheading

src/blog/posts/posts.11tydata.json

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+{
+    "tags": [
+        "posts"
+    ],
+    "permalink": "post/{{ title | slugify }}/",
+    "layout": "post.njk"
+}