webpack.config.dev.js

const webpack = require('webpack');
const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const ErrorOverlayPlugin = require('error-overlay-webpack-plugin');
const Dotenv = require('dotenv-webpack');

process.env.NODE_ENV = 'development';

module.exports = {
  mode: 'development',
  target: 'web',
  devtool: 'cheap-module-source-map',
  entry: './src/index',
  output: {
    path: path.resolve(__dirname, 'build'),
    publicPath: '/',
    filename: 'bundle.js',
  },
  devServer: {
    stats: 'minimal',
    historyApiFallback: true,
    disableHostCheck: true,
    headers: { 'Access-Control-Allow-Origin': '*' },
    https: false,
    port: 8000,
  },
  plugins: [
    new Dotenv(),
    new HtmlWebpackPlugin({
      favicon: 'src/favicon.ico',
      template: 'src/index.html',
    }),
    new ErrorOverlayPlugin(),
  ],
  module: {
    rules: [
      {
        test: /.(js|jsx)$/,
        exclude: /node_modules/,
        use: ['babel-loader', 'eslint-loader'],
      },
      {
        test: /.(css|scss)$/,
        use: ['style-loader', 'css-loader', 'sass-loader'],
      },
      {
        test: /.(jpg|jpeg|png|gif|svg)$/,
        use: [
          {
            loader: 'file-loader',
            options: {
              name: '[path][name]-[hash:8].[ext]',
            },
          },
        ],
      },
    ],
  },
};