Add ordering migration

apps/course/migrations/0018_auto_20180130_1248.py

@@ -0,0 +1,17 @@
+# Generated by Django 2.0.1 on 2018-01-30 12:48
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('course', '0017_auto_20180130_0810'),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name='comment',
+            options={'ordering': ('-created_at',)},
+        ),
+    ]