text: const merge = require('webpack-merge');
  const common = require('./webpack.common.js');
  
  const path = require('path');
  const HtmlWebpackPlugin = require('html-webpack-plugin');
  const CleanWebpackPlugin = require('clean-webpack-plugin');
  const CopyWebpackPlugin = require('copy-webpack-plugin')
  const webpack = require('webpack');
  
  module.exports = merge(common, {
    mode: 'development',
    devtool: 'inline-source-map',
    devServer: {
      contentBase: './dist',
      hot: true
    },
    plugins: [
      new webpack.HotModuleReplacementPlugin(),
      new CopyWebpackPlugin([{
        from: './data/sample-data.json',
        to: './data/data.json'
      }]),
      new CopyWebpackPlugin([{
        from: './data/apps.top100.csv',
        to: './data/apps.top100.csv'
      }])
    ]
  });