Prevent troggle adding the menu if there is one in the file

Add a Docker compose file to bring up a dev troggle easily
Various PEP improvments

templates/core/expedition_list.html

@@ -0,0 +1,14 @@
+{% extends "base.html" %}
+{% load wiki_markup %}
+{% load link %}
+
+{% block content %}
+<h1>Expeditions</h1>
+<ul>
+{% for expedition in object_list %}
+    <li>{{ expedition.year }} - <a href="{{ expedition.get_absolute_url }}">{{ expedition.name }}</a></li>
+{% empty %}
+    <li>No articles yet.</li>
+{% endfor %}
+</ul>
+{% endblock %}