Update '_layouts/post.html'

_layouts/post.html

@@ -1,6 +1,14 @@
 ---
 layout: default
 ---
+
+{% if page.minutes %}
+  {% assign minutes = page.minutes %}
+  {% else %}
+    {% assign minutes = content | number_of_words | divided_by: 180 %}
+      {% if minutes == 0 %}{% assign minutes = 1 %}{% endif %}
+      {% endif %}
+
 <article class="post h-entry" itemscope itemtype="http://schema.org/BlogPosting">
 
   <header class="post-header">
@@ -8,7 +16,7 @@ layout: default
     <p class="post-meta">
       {%- assign date_format = site.minima.date_format | default: "%b %-d, %Y" -%}
       <h3><time class="dt-published" datetime="{{ page.date | date_to_xmlschema }}" itemprop="datePublished"></h3>
-        {{ page.date | date: date_format }}
+        {{ page.date | date: date_format }} |  {{ minutes }} minute read
       </time>
       {%- if page.modified_date -%}
         ~