Resolve "runserver stopped working with aleksis-admin in Django 3.1.6"

Closes #372 (closed)

aleksis/core/__main__.py

@@ -9,4 +9,9 @@ from django.core.management import execute_from_command_line
 def aleksis_cmd():
     """Run django-admin command with correct settings path."""
     os.environ.setdefault("DJANGO_SETTINGS_MODULE", "aleksis.core.settings")
+    sys.argv[0] = os.path.dirname(__file__)
     execute_from_command_line(sys.argv)
+
+
+if __name__ == "__main__":
+    sys.exit(aleksis_cmd())