webpack.config.js

const slsw = require('serverless-webpack');
const path = require('path');
const nodeExternals = require('webpack-node-externals');

module.exports = {
  // Specify the entry point for our app.
  entry: slsw.lib.entries,
  target: 'node',
  // Generate sourcemaps for proper error messages
  devtool: 'source-map',
  externals: [
    nodeExternals({
      modulesFromFile: true,
    }),
  ],
  mode: slsw.lib.webpack.isLocal ? 'development' : 'production',
  optimization: {
    // We do not want to minimize our code.
    minimize: false,
  },
  performance: {
    // Turn off size warnings for entry points
    hints: false,
  },
  module: {
    // Run babel on all .js files and skip those in node_modules
    rules: [
      {
        test: /\.js$/,
        loader: 'babel-loader',
        include: __dirname,
        exclude: /node_modules/,
      },
    ],
  },
  // Specify the output file containing our bundled code
  output: {
    libraryTarget: 'commonjs',
    path: path.resolve(__dirname, '.webpack'),
    filename: '[name].js',
  },
};