Move seckey from settings.py to environment variable

Author: tdunn891

issue_tracker/settings.py

@@ -28,8 +28,7 @@
 # See https://docs.djangoproject.com/en/1.11/howto/deployment/checklist/
 
 # SECURITY WARNING: keep the secret key used in production secret!
-SECRET_KEY = os.environ.get(
-    'SECRET_KEY', 'r81y2+3y=qlb(=0-77rx3k07-8kqdqum5*rn@5a@j8ww194%5f')
+SECRET_KEY = os.environ.get('SECRET_KEY')
 
 # SECURITY WARNING: don't run with debug turned on in production!
 DEBUG = development