Fixed hardcode.

frameworks/JavaScript/express/app.js

@@ -9,8 +9,8 @@ var cluster = require('cluster')
   , express = require('express')
   , mongoose = require('mongoose')
   , async = require('async')
-  , conn = mongoose.connect('mongodb://127.0.0.1/hello_world')
-  , connMap = { user: 'benchmarkdbuser', password: 'benchmarkdbpass', database: 'hello_world', host: '127.0.0.1', charset: 'utf8' };
+  , conn = mongoose.connect('mongodb://localhost/hello_world')
+  , connMap = { user: 'benchmarkdbuser', password: 'benchmarkdbpass', database: 'hello_world', host: 'localhost', charset: 'utf8' };
 
 var Schema = mongoose.Schema
   , ObjectId = Schema.ObjectId;