在Cloud9上啟動一個簡單的DerbyJS項目

Question

我正在嘗試在Cloud9上部署一個簡單的derby項目。

我已經使用Node.js創建了一個工作區，並添加了以下4個文件的內容。

index.html：

<Body:>
  <!--Templates define both HTML and model-view bindings-->
  Holler: <input value="{{hello.message}}">
  <h2>{{hello.message}}</h2>

index.js：

var app = module.exports = require('derby').createApp('hello', __filename);
app.loadViews(__dirname);

// Routes render on client as well as server
app.get('/', function(page, model) {
  // Subscribe specifies the data to sync
  model.subscribe('hello.message', function() {
    page.render();
  });
});

server.js：

require('derby-starter').run(__dirname, {port: process.env.PORT});

package.json：

{
  "name": "derby-examples",
  "description": "Example applications for the Derby framework",
  "version": "0.6.0",
  "repository": "",
  "main": "server.js",
  "dependencies": {
    "derby": "0.6.0-alpha41",
    "derby-starter": "^0.2.6",
    "derby-stylus": "~0.1.0",
    "express": "~3.18.0",
    "d-connection-alert": "~0.1.0",
    "d-before-unload": "~0.1.0",
    "d-bootstrap": "~0.1.0",
    "d-codemirror": "~0.2.0",
    "d-showdown": "~0.1.0",
    "derby-debug": "^0.1.0"
  },
  "optionalDependencies": {},
  "devDependencies": {},
  "engines": {
    "node": "0.10.x"
  }
}

當我啟動服務器時，它一直在說

Important: use process.env.PORT as the port and process.env.IP as the host in your scripts!                                                                                             

debugger listening on port 15454                                                                                                                                                        
Master pid  27985                                                                                                                                                                       
debugger listening on port 15454                                                                                                                                                        
Failed to open socket on port 15454, waiting 1000 ms before retrying                                                                                                                    

並繼續

Failed to open socket on port 15454, waiting 1000 ms before retrying                                                                                                                    

如何正確啟動服務器？

Answer 1

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