webpack.config.js

const path = require('path');
const CopyWebpackPlugin = require('copy-webpack-plugin');

module.exports = {
  entry: './app/js/app.js',
  output: {
    filename: 'app.js',
    path: path.resolve(__dirname, 'build'),
  },
  devServer: {
    historyApiFallback: true,
  },
  plugins: [
    new CopyWebpackPlugin([{
      from: './app/index.html',
      to: 'index.html',
    }]),
  ],
  module: {
    rules: [
      {
        test: /\.css$/,
        use: ['style-loader', 'css-loader'],
      },
      {
        test: /\.(sass|scss)$/,
        use: [
          'style-loader',
          'css-loader',
          'autoprefixer-loader?browsers=last 3 versions',
          'sass-loader?outputStyle=expanded',
        ],
      },
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: ['babel-loader'],
      },
      {
        test: /\.json$/,
        use: ['json-loader'],
      },
      {
        test: /\.woff(2)?(\?v=[0-9]\.[0-9]\.[0-9])?$/,
        use: 'url-loader?limit=10000&mimetype=application/font-woff',
      },

      {
        test: /\.(ttf|eot|svg)(\?v=[0-9]\.[0-9]\.[0-9])?$/,
        use: 'file-loader',
      },
    ],
  },
};