message: ensure npm run build is in production mode
diff: "dev": "webpack --mode=development --colors --progress --debug --watch",
  "dev-server": "webpack-dev-server --mode=development --progress",
  "prod": "node --max_old_space_size=4096 webpack --mode=production --colors --progress",
  - "build": "webpack --mode=production --colors --progress",
  + "build": "NODE_ENV=production webpack --mode=production --colors --progress",
  "lint": "eslint --ignore-path=.eslintignore --ext .js,.jsx .",
  "lint-fix": "eslint --fix --ignore-path=.eslintignore --ext .js,.jsx .",
  "sync-backend": "babel-node --presets env src/syncBackend.js",
  