A tester ! Ça peut m’être très utile :3

{
  "name": "toto",
  "version": "1.0.0",
  "description": "fdsvfkdgbvfi",
  "author": "MOA",
  "license": "MIT",
  "scripts": {
    "build": "npm run build-clean-dist && npm run build-sass && npm run build-autoprefix && npm run optimize-css",
    "build-clean-dist": "rimraf dist",
    "build-sass": "node-sass --output-style expanded --source-map true scss/target.scss dist/target.css",
    "build-autoprefix": "postcss --use autoprefixer --map false --output dist/target.css dist/target.css",
    "optimize-css": "cleancss -o dist/target.min.css dist/target.css"
  },
  "devDependencies": {
    "rimraf": "2.6.2",
    "clean-css-cli": "4.1.11",
    "node-sass": "4.8.3",
    "autoprefixer": "8.2.0",
    "postcss-cli": "5.0.0"
  }
}