npm quick build

package.json

{
  "name": "foobar",
  "version": "0.0.0",
  "description": "foobar description",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "watch-js": "watchify js/app.js -o js/bundle.js",
    "build-js": "browserify js/app.js > js/bundle.js",
    "start": "http-server .",
    "start-dev": "npm run watch-js & npm start"
  },
  "author": "",
  "license": "MIT",
  "devDependencies": {
    "http-server": "^0.6.1",
    "watchify": "^0.6.3",
    "browserify": "^3.33.0"
  }
}