changed project key to .env and updated readme

mysite/settings.py

@@ -11,6 +11,8 @@ https://docs.djangoproject.com/en/5.2/ref/settings/
 """
 
 from pathlib import Path
+import os
+from dotenv import load_dotenv
 
 # Build paths inside the project like this: BASE_DIR / 'subdir'.
 BASE_DIR = Path(__file__).resolve().parent.parent
@@ -20,7 +22,8 @@ BASE_DIR = Path(__file__).resolve().parent.parent
 # See https://docs.djangoproject.com/en/5.2/howto/deployment/checklist/
 
 # SECURITY WARNING: keep the secret key used in production secret!
-SECRET_KEY = 'django-insecure-jl%+_1sb3!uvg#1(jdk-q9bhu&4b*n(xy+$cz4n43gnl@=fx*_'
+load_dotenv()
+SECRET_KEY = os.getenv('DJANGO_KEY')
 
 # SECURITY WARNING: don't run with debug turned on in production!
 DEBUG = True