Fixed error in image centering + added caption to some posts 🚀

Author: chicio

_includes/blog-lazy-image.html

@@ -1,6 +1,6 @@
 {% capture description %}{{ include.description | replace: ' ', '-' | downcase }}{% endcapture %}
-{% capture customClassAndBlogClass %}{{ include.class | default: '' | append: ' figure-img img-fluid rounded blog-image' }}{% endcapture %}
-<figure class="figure">
+{% capture customClassAndBlogClass %}{{ include.class | default: '' | append: ' figure-img img-fluid d-block mx-auto rounded blog-image' }}{% endcapture %}
+<figure class="d-block mx-auto">
   {% include lazy-image.html id=description alt=include.description fill="BDBDBD" src=include.src width=include.width height=include.height class=customClassAndBlogClass %}
   <figcaption class="figure-caption text-center font-italic font-weight-light">{{ include.description }}</figcaption>
 </figure>