moved demo to space setting

cookbook/migrations/0125_space_demo.py

@@ -0,0 +1,18 @@
+# Generated by Django 3.2.3 on 2021-06-04 14:52
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('cookbook', '0124_alter_userpreference_theme'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='space',
+            name='demo',
+            field=models.BooleanField(default=False),
+        ),
+    ]