just add a little bit code refactoring

config.js

@@ -1,4 +1,4 @@
-module.exports.admin_userid = process.env.ADMIN_USERID;
+/*module.exports.admin_userid = process.env.ADMIN_USERID;
 
 module.exports.sitename = process.env.SITENAME;
 module.exports.siteurl = process.env.SITEURL;
@@ -9,4 +9,29 @@ module.exports.gh_consumer_key = process.env.GH_CONSUMER_KEY;
 module.exports.gh_consumer_secret = process.env.GH_CONSUMER_SECRET;
 module.exports.gh_callback = process.env.GH_CALLBACK;
 
-module.exports.express_session_secret = process.env.EXPRESS_SESSION_SECRET;
+module.exports.express_session_secret = process.env.EXPRESS_SESSION_SECRET;*/
+
+/**
+ * You can even config for different enviroment
+ * module.exports = {development: {}, production: {}}
+ *
+ *
+ */
+module.exports = {
+
+  admin_userid: process.env.ADMIN_USERID,
+
+  sitename: process.env.SITENAME,
+
+  siteurl: process.env.SITEURL,
+
+  mongo_uri: process.env.MONGOLAB_URI,
+
+  gh_consumer_key: process.env.GH_CONSUMER_KEY,
+
+  gh_consumer_secret: process.env.GH_CONSUMER_SECRET,
+
+  gh_callback: process.env.GH_CALLBACK,
+
+  express_session_secret: process.env.EXPRESS_SESSION_SECRET
+};

config/config.js

@@ -0,0 +1,37 @@
+/*module.exports.admin_userid = process.env.ADMIN_USERID;
+
+module.exports.sitename = process.env.SITENAME;
+module.exports.siteurl = process.env.SITEURL;
+
+module.exports.mongo_uri = process.env.MONGOLAB_URI;
+
+module.exports.gh_consumer_key = process.env.GH_CONSUMER_KEY;
+module.exports.gh_consumer_secret = process.env.GH_CONSUMER_SECRET;
+module.exports.gh_callback = process.env.GH_CALLBACK;
+
+module.exports.express_session_secret = process.env.EXPRESS_SESSION_SECRET;*/
+
+/**
+ * You can even config for different enviroment
+ * module.exports = {development: {}, production: {}}
+ *
+ *
+ */
+module.exports = {
+
+  admin_userid: process.env.ADMIN_USERID,
+
+  sitename: process.env.SITENAME,
+
+  siteurl: process.env.SITEURL,
+
+  mongo_uri: process.env.MONGOLAB_URI,
+
+  gh_consumer_key: process.env.GH_CONSUMER_KEY,
+
+  gh_consumer_secret: process.env.GH_CONSUMER_SECRET,
+
+  gh_callback: process.env.GH_CALLBACK,
+
+  express_session_secret: process.env.EXPRESS_SESSION_SECRET
+};

config/express.js

@@ -0,0 +1,46 @@
+var express = require('express'),
+    MongoStore = require('connect-mongo')(express);
+
+module.exports = function (app, config) {
+
+  app.use(express.static(__dirname + '/public'));
+
+  app.set('views', __dirname + '/views');
+  app.set('view engine', 'jade');
+
+  app.configure(function () {
+
+    // cookieParser should above session
+    app.use(express.cookieParser());
+
+    // use urlencoded and json to fix connection 3.0 warning
+    app.use(express.urlencoded());
+    app.use(express.json());
+    app.use(express.methodOverride());
+
+    // express/mongo session storage
+    app.use(express.session({
+      secret: config.express_session_secret,
+      store: new MongoStore({
+        url: config.mongo_uri,
+        db: 'pushserver_sessions',
+        clear_interval: 600
+      }, function () {
+        console.log('connected to mongo!');
+      })
+    }));
+
+    // routes should be at last
+    app.use(app.router);
+  });
+
+  // development env config
+  app.configure('development', function () {
+    app.use(express.errorHandler({ dumpException: true, showStack: true }));
+  });
+
+  // production env config
+  app.configure('production', function () {
+    app.use(express.errorHandler());
+  });
+}