docs: use pages

Author: felipecesr

lessons/_config.yml

@@ -3,13 +3,12 @@
 title: Unit Testing React
 ---
 
-<h1>Lessons</h1>
-<hr>
-{% for lesson in site.lessons %}
-<h2>
-  <a href="{{ lesson.url }}">
-    {{ lesson.name }} - {{ lesson.position }}
-  </a>
-</h2>
-<p>{{ lesson.content | markdownify }}</p>
-{% endfor %}
+<ul>
+  {% for page in site.pages %}
+  {% if page.title %}
+  <li>
+    <a href="{{ page.url }}">{{ page.title }}</a>
+  </li>
+  {% endif %}
+  {% endfor %}
+</ul>