使用pkg 建立nodejs執行檔

利用pkg可以把nodejs專案封裝成跨平台的執行檔案
就可以發布單一檔案給個測試平台
不過有幾點需要注意
1.es6轉換
  新版本的nodejs,可以直接運行es6
  不過要使用pkg須先透過babel轉成es5
2.透過pkg設定將其他的檔案封裝到執行檔內
  通常透過程式裡的require,會將相依的檔案封裝到
  應用程式內
  但若有其他如圖檔,css或其他js script要強制封裝進去
  可以透過在package.json內設定pkg來載入
  若設定了則需要透過pkg . 或 pkg package.json指令
  讓pkg知道要另外封裝這些檔案
pkg網址
package.json檔案範例

{
  "name": "simplesocket",
  "version": "1.0.0",
  "description": "build simple socket server excute file for web",
  "main": "lib/index.js",
  "bin": "lib/index.js",
  "scripts": {
    "start": "babel -s inline -d lib -w src | nodemon lib/index.js",
    "build": "pkg package.json --target node8-macos-x64,node8-win-x86 --out-dir output",
    "prepublish": "node_modules/babel-cli/bin/babel.js src --out-dir lib"
  },
  "babel": {
    "presets": [
      "es2015"
    ]
  },
  "pkg": {
    "scripts":"node_modules/extra../**/*.js"
  },
  "repository": {
    "type": "git",
    "url": "git+https://github.com/ozzysun/simpleSocket.git"
  },
  "keywords": [
    "socketio",
    "express",
    "pkg"
  ],
  "author": "ozzysun",
  "license": "ISC",
  "bugs": {
    "url": "https://github.com/ozzysun/simpleSocket/issues"
  },
  "homepage": "https://github.com/ozzysun/simpleSocket#readme",
  "dependencies": {
    ...
  "devDependencies": {
    "babel-cli": "^6.26.0",
    "babel-core": "^6.26.0",
    "babel-preset-es2015": "^6.24.1",
    "nodemon": "^1.11.0"
  }
  
}