Use images instead of featuredImg

`featuredImg` and `bgImg` are preserved in case you want to use a different background image from metadata images

archetypes/posts.md

@@ -3,8 +3,8 @@ title: "{{ replace .Name "-" " " | title }}"
 date: {{ .Date }}
 draft: true
 toc: false
-featuredImg: ""
+images:
 tags: 
-  - tag
+  - untagged
 ---