如何使用Winston logger记录新行中的每条消息?

我们正在使用Winston记录器将事件记录到nodejs fs中，我想使用Winston将每个事件写入新行中，是否可以使用Winston库或与Node.js一起使用的任何其他方法来完成该任务.

we are using winston logger to log events to nodejs fs , i want to write every event into new line using winston, is it possible with to achieve that task using winston library or any other approach that works with nodejs.

ctrl.js

var winston = require('winston');
var consumer = new ConsumerGroup(options, topics);
        console.log("Consumer topics:", getConsumerTopics(consumer).toString());
        logger = new (winston.Logger)({
            level: null,
            transports: [
//                new (winston.transports.Console)(),
                new (winston.transports.File)({
                    filename: './logs/st/server.log',
                    maxsize: 1024 * 1024 * 20,//15728640 is 15 MB
                    timestamp: false,
                    json: false,
                    formatter: function (options) {
                        return options.message;
                    }
                })
            ]
        });
        function startConsumer(consumer) {
            consumer.on('message', function (message) {
                logger.log('info', message.value);
                //callback(message.value);
                io.io().emit('StConsumer', message.value);
            });
            consumer.on('error', function (err) {
                console.log('error', err);
            });
        };
        startConsumer(consumer);