webpack.config.js

const path = require('path');

module.exports = {
  mode: process.env.NODE_ENV,
  entry: './client/index.js',
  output: {
    path: path.resolve(__dirname, 'build'),
    filename: 'bundle.js',
    publicPath: '/',
  },
  module: {
    rules: [
      {
        test: /\.jsx?/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env', '@babel/preset-react'],
          },
        },
      },
      {
        test: /\.s?css/,
        exclude: /node_modules/,
        use: ['style-loader', 'css-loader', 'sass-loader'],
      },
      {
        test: /\.tsx?$/,
        exclude: /node_modules/,
        loader: 'ts-loader',
      },
    ],
  },
  resolve: {
    extensions: ['.tsx', '.ts', '.js'],
  },
  devServer: {
    publicPath: '/build/',
    hot: true,
    contentBase: path.join(__dirname, './client'),
    proxy: {
      '/api': {
        target: 'http://localhost:3000/',
        secure: false,
      },
    },
    // Routes page to index.html in WDS if there is any error with path
    historyApiFallback: true,
  },
};