Update content through Mattrbld

src/posts/test-post.md

@@ -2,7 +2,7 @@
 title: This is my first blog post
 author: Lee Cattarin
 image:
-  src: img/chickadee.jpg
+  src: /img/chickadee.jpg
   alt: a chickadee on a fence post
   title: null
 ___mb_schema: /.mattrbld/schemas/post.json