feat: Add SECRET_KEY environment variable settings (#4235)

Author: shaohuzhang1

apps/maxkb/settings/base.py

@@ -22,7 +22,7 @@
 # See https://docs.djangoproject.com/en/4.2/howto/deployment/checklist/
 
 # SECURITY WARNING: keep the secret key used in production secret!
-SECRET_KEY = 'django-insecure-zm^1_^i5)3gp^&0io6zg72&z!a*d=9kf9o2%uft+27l)+t(#3e'
+SECRET_KEY = CONFIG.get("SECRET_KEY") or 'django-insecure-zm^1_^i5)3gp^&0io6zg72&z!a*d=9kf9o2%uft+27l)+t(#3e'
 
 # SECURITY WARNING: don't run with debug turned on in production!
 DEBUG = CONFIG.get_debug()