Add a readme for the home app

.coveragerc

@@ -14,7 +14,7 @@ omit =
     pydis_site/wsgi.py
     pydis_site/settings.py
     pydis_site/utils/resources.py
-    pydis_site/apps/home/views/home.py
+    pydis_site/apps/home/views.py
 
 [report]
 fail_under = 100

pydis_site/apps/home/README.md

@@ -0,0 +1,35 @@
+# The "home" app
+
+This Django application takes care of serving the homepage of our website, that
+is, the first page that you see when you open pythondiscord.com. It also
+manages the timeline page showcasing the history of our community.
+
+## Directory structure
+
+- `migrations` is the standard Django migrations folder. As with [the API
+  app](../api/README.md), you usually won't need to edit this manually, use
+  `python manage.py makemigrations [-n short_description]` to create a new
+  migration here.
+
+- `templatetags` contains custom [template tags and
+  filters](https://docs.djangoproject.com/en/dev/howto/custom-template-tags/)
+  used in the home app.
+
+- `tests` contains unit tests that validate the home app works as expected. If
+  you're looking for guidance in writing tests, the [Django tutorial
+  introducing automated
+  testing](https://docs.djangoproject.com/en/dev/intro/tutorial05/) is a great
+  starting point.
+
+As for the Python modules residing directly in here:
+
+- `models.py` contains our Django model definitions for this app. As this app
+  is rather minimal, this is kept as a single module - more models would be
+  split up into a subfolder as in the other apps.
+
+- `urls.py` configures Django's [URL
+  dispatcher](https://docs.djangoproject.com/en/dev/topics/http/urls/) for our
+  home endpoints.
+
+- `views.py` contains our Django views. You can see where they are linked in the
+  URL dispatcher.