💄 Updating the UI and style files.

_includes/jumbotron.html

@@ -0,0 +1,9 @@
+<div class="introduction">
+  <img
+    class="introduction-image"
+    src="{{ site.author.avatar | absolute_url }}"
+    alt="{{ site.author.username }}"
+  />
+  <div class="introduction-name">{{ site.title }}</div>
+  <p class="introduction-description">{{ site.description }}</p>
+</div>