flask production and development mode

I have developed an application with flask, and I want to publish it for production, but I do not know how to make a separation between the production and development environment (database and code), have you documents to help me or code. I specify in the config.py file the two environment but I do not know how to do with.

class DevelopmentConfig(Config):
    """
    Development configurations
    """
    DEBUG = True
    SQLALCHEMY_ECHO = True
    ASSETS_DEBUG = True
    DATABASE = 'teamprojet_db'
    print('THIS APP IS IN DEBUG MODE. YOU SHOULD NOT SEE THIS IN PRODUCTION.')


class ProductionConfig(Config):
    """
    Production configurations
    """
    DEBUG = False
    DATABASE = 'teamprojet_prod_db'