Webpack-dev-server seems to run but i get 'This site can’t be reached' when i try to access port

I'm trying to configure webpack to work with typescript and handlebars. Also i've added webpack-dev-server but it's not working. It says that everything is running but when i go to localhost:6000 i get This site can't be reached.

Here is my directory tree:

│   package.json
│   tsconfig.json
│   webpack.config.js 
│
├───dist 
│       bundle.js
│       bundle.js.map
│       index.html
│
└───src
        index.handlebars
        index.ts
        templates.d.ts

And here is webpack.config.js file

const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const webpack = require('webpack');
const path = require('path');

module.exports = {
  entry: './src/index.ts',
  devtool: 'source-map',
  devServer: {
    contentBase: path.resolve(__dirname, 'dist'),
    hot: true,
    host: '0.0.0.0',
    port: 6000,
    open: true
  },
  output: {
    filename: 'bundle.js',
    path: path.resolve(__dirname, 'dist'),
    publicPath: '/dist/'
  },
  resolve: {
    extensions: ['.ts', '.js' ]
  },
  plugins: [
    new webpack.LoaderOptionsPlugin({
      options: {
        handlebarsLoader: {}
      }
    }),
    new HtmlWebpackPlugin({
      title: 'My hometask',
      template: './src/index.handlebars'
    })
  ],
  module: {
    rules: [
      { 
        test: /\.js/,
        loader: 'babel',
        exclude: /(node_modules|bower_components)/
      },
      {
        test: /\.handlebars$/,
        loader: "handlebars-loader"
      },
      {
        test: /\.css$/i,
        use: [MiniCssExtractPlugin.loader, 'css-loader'],
      },
      {
        test: /\.ts?$/,
        use: 'ts-loader',
        exclude: /node_modules/,
      },
    ]
  }
};

What's wrong with that? Why i can't use dev-server?