add superuser creation command and update settings for environment variables

api/management/commands/createsuperuser_if_not_exists.py

@@ -0,0 +1,18 @@
+from django.core.management.base import BaseCommand
+from django.contrib.auth import get_user_model
+import os
+
+class Command(BaseCommand):
+    help = "Create a superuser if it doesn't already exist"
+
+    def handle(self, *args, **kwargs):
+        User = get_user_model()
+        username = os.getenv("DJANGO_SUPERUSER_USERNAME")
+        email = os.getenv("DJANGO_SUPERUSER_EMAIL")
+        password = os.getenv("DJANGO_SUPERUSER_PASSWORD")
+
+        if not User.objects.filter(username=username).exists():
+            User.objects.create_superuser(username=username, email=email, password=password)
+            self.stdout.write(self.style.SUCCESS(f"Superuser {username} created"))
+        else:
+            self.stdout.write(self.style.WARNING(f"Superuser {username} already exists"))