def post_message(self):
        """Send templated message to **#deployments-{env}**.

        Primarily for production deployments.
        """
        message = get_template(template_file='slack/pipeline-prepare-ran.j2', info=self.info)
        channel = '#deployments-prod'
        post_slack_message(message=message, channel=channel, username='pipeline-bot', icon_emoji=':gear:')