{
  "private": true,
  "scripts": {
    "build": "webpack"
  },
  "devDependencies": {
    "bootstrap-notify": "^3.1.3",
    "bootstrap-sass": "^3.3.7",
    "css-loader": "^0.28.5",
    "datatables.net-bs": "^1.10.15",
    "file-loader": "^0.11.2",
    "font-awesome": "^4.7.0",
    "jquery": "^3.2.1",
    "node-sass": "^4.5.3",
    "sass-loader": "^6.0.6",
    "style-loader": "^0.18.2",
    "webpack": "^3.5.5"
  }
}

{
  "private": true,
  "scripts": {
    "build": "webpack",
    "watch": "webpack --watch"
  },
  "devDependencies": {
    "bootstrap-notify": "^3.1.3",
    "bootstrap-sass": "^3.3.7",
    "css-loader": "^0.28.5",
    "datatables.net-bs": "^1.10.15",
    "file-loader": "^0.11.2",
    "font-awesome": "^4.7.0",
    "jquery": "^3.2.1",
    "node-sass": "^4.5.3",
    "sass-loader": "^6.0.6",
    "style-loader": "^0.18.2",
    "webpack": "^3.5.5"
  }
}

Add watch command for npm
Add watch command for npm
