AWS Cloudformation: Custom API Gateway Domain Name

cf_snippet_api_gw_custom_domain.yaml

APIRecordSet:
    Type: AWS::Route53::RecordSet
    Properties:
      HostedZoneId: !Ref hosted-zone-id
      Comment: CNAME Redirect to the API Gateway
      Name: !Join
         - ""
         - [ my-api. , !Ref hosted-zone-name, '.']
      Type: CNAME
      TTL: '300'
      ResourceRecords:
        - !GetAtt ApiGwCustomDomainName.DistributionDomainName    
 
 ApiGwCustomDomainName:
    Type: AWS::ApiGateway::DomainName
    Properties:
      DomainName: !Join [ . , [ my-api, !Ref hosted-zone-name ]]
      CertificateArn: !Ref certificateArn  
      
  ApiBasePathMapping:
    Type: 'AWS::ApiGateway::BasePathMapping'
    Properties:
      DomainName: !Ref ApiGwCustomDomainName
      RestApiId: !Ref MyApiGateway
      Stage: uat