text: const webpack = require('webpack');
  const merge = require('webpack-merge');
  const common = require('./webpack.config.common.js');
  
  module.exports = merge(common, {
    mode: 'development',
    devServer: {
      contentBase: 'src',
      watchContentBase: true,
      hot: true,
      open: true,
      port: process.env.PORT || 9000,
      host: process.env.HOST || '0.0.0.0',
    },
    module: {
      rules: [
        {
          test: /\.(sass|scss)$/,
          use: ['style-loader', 'css-loader', 'postcss-loader', 'sass-loader'],
        },
      ],
    },
    plugins: [new webpack.HotModuleReplacementPlugin()],
  });
  