added superuser support in apps.lyric.admin & new manage.py cmd ensure_superuser; .tests.integrated.test_admin & .test_management_commands green

src/apps/lyric/management/commands/ensure_superuser.py

@@ -0,0 +1,21 @@
+import os
+
+from django.core.management.base import BaseCommand
+
+from apps.lyric.models import User
+
+
+class Command(BaseCommand):
+    help = "Create a superuser if none exists"
+
+    def handle(self, *args, **options):
+        if User.objects.filter(is_superuser=True).exists():
+            self.stdout.write("Superuser already exists!")
+            return
+        email = os.environ.get('DJANGO_SUPERUSER_EMAIL')
+        password = os.environ.get('DJANGO_SUPERUSER_PASSWORD')
+        if not email or not password:
+            self.stdout.write("Superuser credentials not set!—skipping")
+            return
+        User.objects.create_superuser(email=email, password=password)
+        self.stdout.write("Superuser created!")