Scaffold containerized Django/Wagtail app with core features

templates/blog/blocks/code_block.html

@@ -0,0 +1,5 @@
+{% load wagtailcore_tags %}
+<div class="code-block">
+  {% if value.filename %}<div>{{ value.filename }}</div>{% endif %}
+  <pre data-lang="{{ value.language }}"><code class="language-{{ value.language }}">{{ value.raw_code }}</code></pre>
+</div>