text: import os
  
  DEBUG = False
  TESTING = False
  SECRET_KEY = os.environ.get('SECRET_KEY') or 'not-so-secret'
  SQLALCHEMY_DATABASE_URI = os.environ.get('SQLALCHEMY_DATABASE_URI') or 'sqlite://'
  SQLALCHEMY_ECHO = False
  SQLALCHEMY_TRACK_MODIFICATIONS = False
  CSRF_ENABLED = True
  WTF_CSRF_ENABLED = CSRF_ENABLED
  CSRF_SESSION_KEY = SECRET_KEY
  REDIS_URL = os.environ.get('REDIS_URL') or 'redis://'
  MAILGUN_DOMAIN = os.environ.get('MAILGUN_DOMAIN') or 'unknown'
  MAILGUN_API_KEY = os.environ.get('MAILGUN_API_KEY') or 'invalid'
  EMAIL_SENDER = f'brewlog@{MAILGUN_DOMAIN}'
  EMAIL_CONFIRM_MAX_AGE = PASSWORD_RESET_MAX_AGE = 60 * 60 * 24 * 2
  
  # flatpages
  FLATPAGES_EXTENSION = '.html.md'
  FLATPAGES_MARKDOWN_EXTENSIONS = []
  
  # babel
  BABEL_DEFAULT_LOCALE = os.getenv('BABEL_DEFAULT_LOCALE') or 'pl'
  BABEL_DEFAULT_TIMEZONE = os.getenv('BABEL_DEFAULT_TIMEZONE') or 'Europe/Warsaw'
  
  # display limits
  SHORTLIST_DEFAULT_LIMIT = 5
  LIST_DEFAULT_LIMIT = 10
  