NodeJS logging module

This code is for a NodeJS logging module. I created it because I wanted to find a way to log different type of things but not show them all at the same time. I also wanted to format the logs in a custom manner.

Is there anything I could do to improve this code, such as making it shorter? Are there still any bugs?

// original way of adding config
//var config  = require('config');
var config  = {
     debug: true,
     debugArray:['info','warn']//add remove log types to show
     //'info','warn','error','log','system','socketio','sql'
};

var dateFormat = require('dateformat');
var chalk = require('chalk');
var path = require('path');
var Logger = Object.create({});
var define = Object.defineProperty.bind(undefined, Logger);

function doLog(msg, type, search, stack){
  if(config.debug && ( config.debugArray.indexOf(search) > -1)){
      var fdate = dateFormat(new Date(), 'yyyy-mm-dd hh:MM:ss.l');
      var fFilename = stack.getFileName().substr(path.dirname(require.main.filename).length + 1);
      var lineNumber = stack.getLineNumber();
      var preMsg =  fdate + ' ' +  type + ' [' + chalk.yellow(fFilename + ':' + lineNumber) + '] ';
      console.log(preMsg + msg);
  }
}
Logger.log = function (txt){
  doLog(txt,'LOG', 'log', this.stack[1]);
};

Logger.system = function (txt){
  doLog(chalk.gray(txt), chalk.gray('SYSTEM'), 'system', this.stack[1]);
};

Logger.socketio = function (txt){
  doLog(chalk.cyan(txt), chalk.cyan('SOCKET'), 'socketio', this.stack[1]);
};

Logger.sql = function (txt){
  doLog(txt, chalk.cyan('SQL'), 'sql', this.stack[1]);
};

Logger.info = function (txt){
  doLog(chalk.cyan(txt), chalk.cyan('INFO'), 'info', this.stack[1]);
};

Logger.warn = function (txt){
  doLog(chalk.yellow(txt), chalk.yellow('WARN'), 'warn', this.stack[1]);
};

Logger.error = function (txt){
  doLog(chalk.red(txt), chalk.red('ERROR'), 'error', this.stack[1]);
};

define('stack', {
  get: function(){
    var originalStack = Error.prepareStackTrace;
    Error.prepareStackTrace = function(_, stack){ return stack; };
    var err = new Error();
    Error.captureStackTrace(err, arguments.callee);
    var stack = err.stack;
    Error.prepareStackTrace = originalStack;
    return stack;
  }
});

module.exports = Logger;