Add login functionality and basic HTML pages

code/app/templates/index.html

@@ -1,8 +1,6 @@
 {% extends "base.html" %}
 
 {% block content %}
-    <h1>Hi, {{ user.username }}!</h1>
-    {% for post in posts %}
-    <div><p>{{ post.author.username }} says: <b>{{ post.body }}</b></p></div>
-    {% endfor %}
+    <h1>IGDB: International Glacier Database</h1>
+    The IGDB is a database, that uses data from the <a href="https://dx.doi.org/10.5904/wgms-fog-2019-12">WGMS</a> to illustrate the consequences of climate change.
 {% endblock %}