text: """FlaskのConfigを提供する"""
  import os
  
  
  class DevelopmentConfig:
  
      # Flask
      DEBUG = True
  
      # SQLAlchemy
      SQLALCHEMY_DATABASE_URI = 'sqlite:///circular.db'
      SQLALCHEMY_TRACK_MODIFICATIONS = False
      SQLALCHEMY_ECHO = False
  
  Config = DevelopmentConfig