Rewrite of Comic lists so that tehy have thumbnails. (#26)

comic/migrations/0023_directory_thumbnail.py

@@ -0,0 +1,19 @@
+# Generated by Django 3.2 on 2021-04-21 17:44
+
+from django.db import migrations
+import imagekit.models.fields
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('comic', '0022_comicbook_thumbnail'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='directory',
+            name='thumbnail',
+            field=imagekit.models.fields.ProcessedImageField(null=True, upload_to='thumbs'),
+        ),
+    ]