feat: default superuser migration

backend/migrations/0004_create_default_superuser.py

@@ -0,0 +1,29 @@
+import os
+from django.db import migrations
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('backend', '0003_auto_20200605_0041'),
+    ]
+
+    def generate_superuser(apps, schema_editor):
+        from django.contrib.auth.models import User
+
+        SU_NAME = 'admin'
+
+        try: 
+            User.objects.get(username=SU_NAME)
+        except User.DoesNotExist:
+            SU_EMAIL = 'admin@example.com'
+            SU_PASSWORD = 'admin'
+            superuser = User.objects.create_superuser(
+                username=SU_NAME,
+                email=SU_EMAIL,
+                password=SU_PASSWORD)
+            superuser.is_superuser = True
+            superuser.is_staff = True
+            superuser.save()
+
+    operations = [
+        migrations.RunPython(generate_superuser),
+    ]