webpack.config.js

const path = require('path');
const MomentLocalesPlugin = require('moment-locales-webpack-plugin');
const CopyWebpackPlugin = require("copy-webpack-plugin");
const nodeExternals = require('webpack-node-externals');

module.exports = (env) => ({
  context: __dirname,
  mode: 'production',
  entry: './src/index.ts',
  resolve: {
    extensions: ['.js', '.json', '.ts'],
    symlinks: false,
    cacheWithContext: false,
  },
  output: {
    libraryTarget: 'commonjs',
    filename: 'index.js',
    path: path.resolve(__dirname, 'lib')
  },
  target: 'node',
  externals: [ nodeExternals() ],
  module: {
    rules: [
      {
        test: /\.tsx?$/,
        use: 'ts-loader',
        exclude: /node_modules/,
      },
    ],
  },
  resolve: {
    extensions: [ '.tsx', '.ts', '.js' ],
  },
  plugins: [
    new MomentLocalesPlugin({
      localesToKeep: ['pt-br']
    }),
    new CopyWebpackPlugin({
      patterns: [
        {
          from: './package.json'
        },
        {
          from: './package-lock.json'
        }
      ]
    })
  ]
});