Logger setup for winston in node express

logger.js

const winston = require('winston');

const transports = {
  console: new winston.transports.Console({
    level: process.env.NODE_ENV === 'production' ? 'error' : 'debug',
    handleExceptions: true,
    format: winston.format.simple(),
    colorize: true,
  }),
  file: new winston.transports.File({
    filename: 'error.log',
    level: 'error',
    handleExceptions: true,
    json: true,
    maxsize: 5242880, // 5MB
    maxFiles: 5,
    colorize: false,
  }),
};

const logger = winston.createLogger({
  transports: [
    transports.console,
    transports.file,
  ],
  exitOnError: false,
});

if (process.env.NODE_ENV !== 'production') {
  logger.debug('Logging initialized at debug level');
}

logger.stream = {
  write(message, encoding) {
    logger.info(message);
  },
};

module.exports = logger;