webpack.config.js

const path = require('path');

const nodeExternals = require('webpack-node-externals');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
const NodemonPlugin = require('nodemon-webpack-plugin');
const Dotenv = require('dotenv-webpack');

const { NODE_ENV = 'development' } = process.env;

module.exports = {
  entry: {
    server: './src/server.ts',
  },
  output: {
    filename: '[name].bundle.js',
    // filename: "index.js",
    path: path.resolve(__dirname, 'dist'),
    libraryTarget: 'commonjs',
  },
  mode: NODE_ENV,
  target: 'node',
  module: {
    rules: [
      {
        test: /\.ts(x?)$/,
        use: 'ts-loader',
        exclude: /node_modules/,
      },
    ],
  },
  externals: [nodeExternals()],
  watch: NODE_ENV === 'development',
  resolve: {
    extensions: ['.ts', '.js'],
  },
  plugins: [
    new CleanWebpackPlugin(),
    new NodemonPlugin(),
    new Dotenv({
      path:
        process.env.NODE_ENV === 'production'
          ? __dirname + '/src/environment/production.env'
          : __dirname + '/src/environment/development.env',
    }),
  ],
};