old_contents: 
  var configfile = process.env.VOICER_CONFIGFILE || './config';
  var fileExists = require('file-exists');
  
  if (fileExists(configfile + '.js')) {
    var config = require(configfile);
    var Voicer = require('./index');
  
    var voicer = new Voicer(config);
    voicer.start();
  } else {
    console.log('no configfile');
  }
new_contents: #!/usr/bin/node
  
  var configfile = process.env.VOICER_CONFIGFILE || './config';
  var fileExists = require('file-exists');
  
  if (fileExists(configfile + '.js')) {
    var config = require(configfile);
    var Voicer = require('./index');
  
    var voicer = new Voicer(config);
    voicer.start();
  } else {
    console.log('no configfile');
  }
subject: add path to app.js