npm build:prod error about serverless-sam-typescript-boilerplate HOT 1 OPEN

import { resolve } from 'path';
import { readFileSync } from 'fs';
import { yamlParse } from 'yaml-cfn';
import { Configuration } from 'webpack';

/* eslint-disable */
const { compilerOptions } = require('./tsconfig.json');
/* eslint-enable */

/** Webpack Config Variables */
const conf = {
  prodMode: process.env.NODE_ENV === 'production',
  templatePath: '../../template.yaml'
};

/**
 * Parsing tsconfig.json paths to resolve aliases
 */
const tsPaths = Object.keys(compilerOptions.paths).reduce(
  (paths, path) =>
    Object.assign(paths, { [`${path}`]: resolve(__dirname, compilerOptions.paths[path][0]) }),
  {}
);

/**
 * Parsing template.yaml file for function dir locations
 */

/** Interface for AWS SAM Function */

const { Resources: resources } = yamlParse(readFileSync(conf.templatePath, 'utf-8'));


interface ISamFunction {
  Type: string;
  Properties: {
    AssumeRolePolicyDocument?: JSON;
    AutoPublishAlias?: string;
    AutoPublishCodeSha256?: string;
    CodeUri?: string;
    Description?: string;
    Environment?: {
      Variables: {
        [key: string]: string;
      };
    };
    // Events?: EventSource;
    FunctionName?: string;
    Handler: string;
    Layers?: { [Ref: string]: string }[];
    Runtime: string;
    Timeout?: number;
    Tracing?: string;
    VersionDescription?: string;
  };
}

const entries = Object.values(resources)

  .filter((resource: ISamFunction) => resource.Type === 'AWS::Serverless::Function')

  .filter(
    (resource: ISamFunction) =>
      resource.Properties.Runtime && resource.Properties.Runtime.startsWith('nodejs')
  )

  .map((resource: ISamFunction) => ({
    filename: resource.Properties.Handler.split('.')[0],
    entryPath: resource.Properties.CodeUri.split('/').splice(3).join('/'),
  }))

  .reduce(
    (resources, resource) =>
      Object.assign(resources, {
        [`${resource.filename}`]: `./src/${resource.entryPath}${resource.filename}.ts`,
      }),
    {}
  );

/**
 * Webpack Config
 */
const webpackConfig: Configuration = {
  entry: entries,
  target: 'node',
  mode: conf.prodMode ? 'production' : 'development',
  module: {
    rules: [
      {
        test: /\.tsx?$/,
        use: 'ts-loader',
      },
    ],
  },
  resolve: {
    extensions: ['.tsx', '.ts', '.js'],
    alias: tsPaths,
  },
  output: {
    path: resolve(__dirname, 'dist'),
    filename: '[name].js',
    libraryTarget: 'commonjs2',
  },
  devtool: 'source-map',
  plugins: [],
};

export default webpackConfig;