var path = require('path');
const ExtractTextPlugin = require("extract-text-webpack-plugin");

module.exports = {
    entry: "./less/main.less", // путь откуда берет less
    node: {
        fs: 'empty',
        net: 'empty'
    },
    output: {
        path: __dirname + "/public/css", // путь куда вставлять компилированный css
        filename: "bundle.js"
    },
    module: {
        rules: [{
                test: /.less$/,
                use: ExtractTextPlugin.extract({
                    fallback: "style-loader",
                    use: ["css-loader", "less-loader"]
                })
            },
            {
                test: /.(png|jpg|jpeg|svg|gif)$/,
                include: [
                    path.resolve(__dirname, './img/')  // а тут надо прописать имя папки откуда будет брать все картинки
                ],
                use: [{
                    loader: 'file-loader',
                    options: {
                        name: './public/img/[hash].[ext]',
                    }
                }]
            },
            {
                test: /.(ttf|eot|woff|woff2|png|jpg|jpeg|svg|gif)$/,
                loader: 'url-loader'
            },
        ]
    },
    plugins: [
        new ExtractTextPlugin({
            filename: 'main.css' // а тут надо прописать имя css которое вы хотите
        })
    ]
};

{
  "name": "********",
  "version": "1.0.0",
  "description": "***********************",
  "main": "serv.js",
  "scripts": {
    "start": "node serv",
    "watch": "webpack -w --config webpack.config.js"/*команда запуска webpack  npm rum watch*/
  },
  "repository": {
    "type": "git",
    "url": "**********************************"
  },
  "keywords": [
    "short",
    "advertising",
    "site"
  ],
  "author": "***************",
  "license": "ISC",
  "homepage": "*******************",
  "dependencies": {
        "body-parser": "^1.18.2",
"css-loader": "^0.28.7",
"express": "^4.16.1",
"fs": "0.0.1-security",
"mongoose": "^4.12.1",
"style-loader": "^0.19.0",
"url-loader": "^0.6.2"
  },
  "devDependencies": {
    "extract-text-webpack-plugin": "^3.0.1",
"file-loader": "^1.1.5",
"less": "^2.7.2",
"less-loader": "^4.0.5",
"webpack": "^3.6.0"
  }
}

sass -w

browser-sync start --server --files "*.css"