Add new management command to create superuser if not present. Use that command in the entrypoint scripts

entrypoint.sh

@@ -3,4 +3,6 @@ source /home/shimatta/kenkyusho/.venv/bin/activate
 cd /home/shimatta/kenkyusho/shimatta_kenkyusho
 python manage.py migrate --settings shimatta_kenkyusho.settings_production
 python manage.py collectstatic --settings shimatta_kenkyusho.settings_production --noinput
+python manage.py create_kenkyusho_admin_user --settings shimatta_kenkyusho.settings_production
+
 gunicorn -w 4 --bind 0.0.0.0:8000 shimatta_kenkyusho.wsgi:application

entrypoint_self_hosted.sh

@@ -2,5 +2,6 @@
 source /home/shimatta/kenkyusho/.venv/bin/activate
 cd /home/shimatta/kenkyusho/shimatta_kenkyusho
 python manage.py migrate --settings shimatta_kenkyusho.settings_production
+python manage.py create_kenkyusho_admin_user --settings shimatta_kenkyusho.settings_production
 
 python manage.py runserver 0.0.0.0:8000 --settings shimatta_kenkyusho.settings_production

shimatta_kenkyusho/parts/management/commands/create_kenkyusho_admin_user.py

@@ -0,0 +1,23 @@
+from django.core.management.base import BaseCommand, CommandParser
+from django.contrib.auth import get_user_model
+
+class Command(BaseCommand):
+	help = "Create a default superuser if no superuser is already present. This aids automatic deployment inside a container."
+
+	def add_arguments(self, parser: CommandParser):
+		parser.add_argument('--user',
+			help='Username to create if no admin account is present',
+			default='admin')
+		parser.add_argument('--password',
+			help='Password to set for newly created user. Ignored, if any admin user is already present',
+			default='admin')
+
+	def handle(self, *args, **options):
+		User = get_user_model()
+
+		# Query if there is any admin user
+		if not User.objects.filter(is_superuser=True).exists():
+			self.stdout.write(f'No superuser present. Creating {options['user']} with supplied password')
+			User.objects.create_superuser(username=options['user'], password=options['password'])
+		else:
+			self.stdout.write('At least one superuser already exists. Skipping superuser creation')