winston logger with filename

import { createLogger, format, transports } from 'winston'
const { combine, timestamp, label, printf } = format;

const myFormat = printf(info => {
  return `${info.timestamp} [${info.label}] ${info.level} - ${info.message}`;
});

module.exports = function(fileName) {
  return createLogger({
    format: combine(
      timestamp(),
      label({label: fileName}),
      myFormat
    ),
    transports: [new transports.Console({
      level: process.env.STAGE === 'PROD' ? 'error' : 'debug'
    })]
  })
}