{
  "name": "webpack-simple-starter",
  "version": "1.0.0",
  "description": "",
  "main": "src/js/index.js",
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "babel-core": "^6.24.1",
    "babel-loader": "^7.0.0",
    "babel-preset-env": "^1.4.0",
    "css-loader": "^0.28.1",
    "node-sass": "^4.5.2",
    "postcss-loader": "^2.0.5",
    "sass-loader": "^6.0.5",
    "style-loader": "^0.17.0",
    "webpack": "^2.5.1",
    "webpack-dev-server": "^2.4.5"
  },
  "scripts": {
    "start": "webpack-dev-server",
    "build": "webpack -p"
  }
}
{
  "name": "webpack-simple-starter",
  "version": "1.0.0",
  "description": "",
  "main": "src/js/index.js",
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "babel-core": "^6.24.1",
    "babel-loader": "^7.0.0",
    "babel-preset-env": "^1.4.0",
    "css-loader": "^0.28.1",
    "node-sass": "^4.5.2",
    "postcss-loader": "^2.0.5",
    "rimraf": "^2.6.1",
    "sass-loader": "^6.0.5",
    "style-loader": "^0.17.0",
    "webpack": "^2.5.1",
    "webpack-dev-server": "^2.4.5"
  },
  "scripts": {
    "dev": "webpack-dev-server",
    "build": "npm run clean && webpack -p",
    "clean": "rimraf ./dist/*"
  }
}

Add clean task + change task names
Add clean task + change task names
