Increase width of index pages

Author: mosabua

layouts/_default/list.html

@@ -120,7 +120,7 @@ <h4 class="list-title">Featured Tutorials</h3>
       </div>
     </div>
     <div class="row justify-content-center topic-container flex-shrink-1">
-      <div class="col-md-12 col-lg-10 col-xl-8">
+      <div class="docs-content">
         <article>
           <h1 class="text-center">{{ if eq .CurrentSection .FirstSection }}{{ .Section | humanize }}{{ else }}{{ .Title }}{{ end }}</h1>
           <div>{{ .Content }}</div>