Add new migration for file hash

opentech/images/migrations/0002_customimage_file_hash.py

+# Generated by Django 2.0.8 on 2018-08-21 08:33
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('images', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='customimage',
+            name='file_hash',
+            field=models.CharField(blank=True, editable=False, max_length=40),
+        ),
+    ]