put index page on it's own special layout

_includes/layouts/index.njk

@@ -0,0 +1,5 @@
+---
+layout: page.njk
+---
+
+{{ content | safe }}

src/index.md

@@ -5,6 +5,7 @@ hero:
   alt: chickadee
   title: null
 ___mb_schema: /.mattrbld/schemas/page.json
+layout: index.njk
 ---
 ## Here’s an h2
 
@@ -13,9 +14,9 @@ This is a paragraph.
 This is another paragraph. It might be a bit longer.
 
 -   Here’s a list.
-    
+
 -   It’s nice, the editor automatically turns dashes into lists
-    
+
 
 And I can double-enter to get out of the list.
 
@@ -36,13 +37,13 @@ Let’s add a link. Here’s my [website](https://leecat.art). They let you choo
 ## Let’s do more with lists
 
 1.  Here’s an ordered list
-    
+
     1.  it has a nested ordered list inside of it!
-        
+
     2.  How fancy.
-        
+
 2.  You can of course tab and shift+tab to change your list level.
-    
+
 
 ---