aws-cdk with s3 and cloudfront distribution

aws-cdk-stack-cloudfront.ts

import cdk = require('@aws-cdk/core');
import s3 = require('@aws-cdk/aws-s3'); 
import cloudfront = require('@aws-cdk/aws-cloudfront');

export class AwsCdkStack extends cdk.Stack {
  constructor(scope: cdk.Construct, id: string, props?: cdk.StackProps) {
    super(scope, id, props);

    const s3Bucket = new s3.Bucket(this, 'host-bucket', {
      bucketName: `react-host-bucket-9f7317d0dd7c`,
      websiteIndexDocument: 'index.html',
      websiteErrorDocument: 'error.html',
      publicReadAccess: true
    });

    const distribution = new cloudfront.CloudFrontWebDistribution(this, 'my-distribution', {
      originConfigs: [
          {
              s3OriginSource: {
                  s3BucketSource: s3Bucket
              },
              behaviors : [ {isDefaultBehavior: true}]
          }
      ],
      defaultRootObject: 'index.html'
   });
  }
}