webpack.config.js

const path = require('path');
const slsw = require('serverless-webpack');
const nodeExternals = require('webpack-node-externals');
const ForkTsCheckerWebpackPlugin = require('fork-ts-checker-webpack-plugin');
const TsconfigPathsPlugin = require('tsconfig-paths-webpack-plugin');

const isLocal = slsw.lib.webpack.isLocal;

module.exports = {
  mode: isLocal ? 'development' : 'production',
  devtool: isLocal ? 'source-map' : 'source-map',
  entry: slsw.lib.entries,
  target: 'node',
  stats: 'summary',
  resolve: {
    extensions: ['.cjs', '.mjs', '.js', '.json', '.ts'],
    plugins: [
      new TsconfigPathsPlugin({
        configFile: './tsconfig.json'
      })
    ]
  },
  output: {
    libraryTarget: 'commonjs2',
    path: path.join(__dirname, '.webpack'),
    filename: '[name].js'
  },
  externals: ['aws-sdk', nodeExternals()],
  module: {
    rules: [
      {
        test: /\.(ts?)$/,
        loader: 'ts-loader',
        exclude: [
          [
            path.resolve(__dirname, 'node_modules'),
            path.resolve(__dirname, '.serverless'),
            path.resolve(__dirname, '.webpack')
          ]
        ]
      }
    ]
  },
  plugins: [new ForkTsCheckerWebpackPlugin()],
  stats: 'errors-only'
};