bug fix to master for blog

blog.njk was deleted from the master which was causing an issue with merging the blog changes properly from issue #10

Author: QuincyGow

packages/docs/src/_includes/layouts/blog.njk

@@ -0,0 +1,17 @@
+{% extends 'layouts/base.njk' %}
+{% set pageType = 'Post Archive' %}
+
+{# Intro content #}
+{% set introHeading = title %}
+{% set introSummary %}{{ content | safe }}{% endset %}
+
+{# Post list content #}
+{% set postListHeading = 'All posts' %}
+{% set postListItems = collections.posts %}
+
+{% block content %}
+  <main id="main-content">
+    {% include "partials/components/intro.njk" %}
+    {% include "partials/components/post-list.njk" %}
+  </main>
+{% endblock %}