Use django function for secret_key generation (#12999)

src/backend/InvenTree/InvenTree/config.py

@@ -4,9 +4,7 @@ import datetime
 import json
 import logging
 import os
-import random
 import shutil
-import string
 import sys
 from pathlib import Path
 from typing import Any, Optional
@@ -448,9 +446,10 @@ def get_secret_key(return_path: bool = False) -> str | Path:
         logger.info("Generating random key file at '%s'", secret_key_file)
         ensure_dir(secret_key_file.parent)
 
-        # Create a random key file
-        options = string.digits + string.ascii_letters + string.punctuation
-        key = ''.join([random.choice(options) for _idx in range(100)])
+        # Create a random key file (using a cryptographically secure generator)
+        from django.core.management.utils import get_random_secret_key
+
+        key = get_random_secret_key()
         secret_key_file.write_text(key)
 
     if return_path: