AWSTemplateFormatVersion: "2010-09-09"
Resources:
  myInstance:
    Type: AWS::EC2::Instance
    Properties:
      ImageId: ami-123456
Outputs:
  GitlabDomain:
    Description: The domain name of the Gitlab server
    Value: !Sub
    - 'gitlab.${zone}'
    - zone: !ImportValue infra-ZonePublic-Name