app.config.from_json = from_json

    app.config.from_json(config_file, silent=True)

    app.config.setdefault('BOOTSTRAP_SERVE_LOCAL', True)

    bootstrap.init_app(app)

    @app.after_request

    def add_headers(response):

        response.headers.setdefault('Access-Control-Allow-Origin', '*')

        response.headers.setdefault('Cache-Control', 'no-cache')

        return response

    from .views import root_views

    app.register_blueprint(root_views)

    from .state import state_views

    app.register_blueprint(state_views, url_prefix='/state')

    from .sensors import sensors_views

    app.register_blueprint(sensors_views, url_prefix='/sensors')