old_contents: var winston = require('winston');
  var moment = require('moment');
  let fs = require('fs')
  
  function getLogger(nconf) {
    var log_level = nconf.get('loglevel');
    var logger = new (winston.Logger)({
      transports: [
        new (winston.transports.Console)({
          "level": log_level,
          "json": nconf.get('json'),
          "timestamp": function() {
            return moment();
          }
        })
      ]
    });
    var logzioTokenFile = nconf.get("LOGZIO_TOKEN_FILE");
    if (logzioTokenFile) {
      let logzioToken = fs.readFileSync(logzioTokenFile, 'utf8').trim()
      var logzioWinstonTransport = require('winston-logzio');
      var loggerOptions = {
          token: logzioToken,
          host: 'listener.logz.io',
      };
      logger.add(logzioWinstonTransport, loggerOptions);
    }
    return logger
  }
  module.exports.getLogger = getLogger; 
  
new_contents: var winston = require('winston');
  var moment = require('moment');
  let fs = require('fs')
  
  function getLogger(nconf) {
    var log_level = nconf.get('loglevel');
    var logger = new (winston.Logger)({
      transports: [
        new (winston.transports.Console)({
          "level": log_level,
          "json": nconf.get('json'),
          "stringify": true,
          "timestamp": function() {
            return moment();
          }
        })
      ]
    });
    return logger
  }
  module.exports.getLogger = getLogger; 
  
subject: Remove logzio and make json log single line