const winston = require('winston'); const logger = winston.createLogger({ level: 'info', format: winston.format.json(), defaultMeta: { service: 'user-service' }, transports: [ // // - Write all logs with level `error` and below to `error.log` // - Write all logs with level `info` and below to `combined.log` // new winston.transports.File({ filename: 'error.log', level: 'error' }), new winston.transports.File({ filename: 'combined.log' }), ], }); // // If we're not in production then log to the `console` with the format: // `${info.level}: ${info.message} JSON.stringify({ ...rest }) ` // if (process.env.NODE_ENV !== 'production') { logger.add(new winston.transports.Console({ format: winston.format.simple(), })); }