webpack.config.js

const path = require('path');

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

module.exports = {
  entry: slsw.lib.entries,
  mode: process.env.WEBPACK_MODE || 'production',
  devtool: 'source-map',
  target: 'node',
  externals: [nodeExternals({ modulesFromFile: true })],
  performance: {
    hints: false,
  },
  output: {
    libraryTarget: 'commonjs',
    path: path.join(__dirname, '.webpack'),
    filename: '[name].js',
    sourceMapFilename: '[name].map',
  },
  module: {
    rules: [
      {
        test: /\.js?$/,
        exclude: /node_modules/,
        use: [
          {
            loader: 'babel-loader',
            options: {
              cacheDirectory: true,
            },
          },
        ],
      },
    ],
  },
};