Determine the top contributors in your Jekyll website.

top_categories_jekyll.html

<ul>
	{% for category in site.categories %}
	{% assign category_name = category[0] %}
	<li>
		<a href="/blog/categories/{{ category_name | slugify }}/">
			{{ category_name | capitalize | replace: "-", " " }}:
			<span class="badge badge-light">{{site.categories[category_name].size}} articles
			</span>
		</a>
	</li>
	{% endfor %}
</ul>

top_contributors_jekyll.html

<div class="contributors_block">
{% assign top_authors = site.posts | group_by: 'author' |sort: 'size' | limit: 5 %}
<ul>
{% for author in top_authors %}
	<li id="contributor_id{{forloop.index}}">
    	<a href="/blog/{{author.name}}">{{author.name}}</a>
		<p class="badge badge-light">{{author.size}}</p>
  	</li>
{% endfor %}                       
</ul>
</div>