Step 1

backpack.config.js

const path = require('path');

module.exports = {
  webpack: (config, options, webpack) => {
  
    // change Backpack's default entry point to 'src/server.js'
    config.entry.main = path.join(__dirname, 'src/server.js');

    // Tell Backpack how to handle .css files (load into memory and noop)
    config.module.rules.push({
      test: /\.css$/,
      use: ['css-loader'],
    });

    return config;
  },
};