Sass, babel, uglify, imagemin builder

npm start script

{
  "name": "npm-config",
  "version": "1.0.0",
  "description": "task with pure node",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "build-css": "node-sass src/css/style.scss dist/css/style.css",
    "build-js": "babel --presets babel-preset-es2015 dist/js/app.js -d dist/js/",
    "minify-js": "uglifyjs dist/js/app.js -o dist/js/app.min.js",
    "optimize": "imagemin src/img/* --out-dir=dist/img/",
    "watch-css": "node-sass src/css/style.scss dist/css/style.css -watch",
    "watch-js": "babel --presets babel-preset-es2015 dist/js/app.js -d dist/js/ -watch",

  },
  "author": "",
  "license": "ISC"
}