Why html_repo_runtime is added in the resources section of mta.yml file?

[fioriexpert]

Hi Experts,

I'm trying to create a basic MTA project with a standalone approuter and followed the following steps - 

1. New project from template -> Basic MutliTarget Application.
2. Right click on mta.yml file -> Create MTA module from template.
3. Choose Approuter Configuration.
4. Select Standalone approuter and choose NO for "if you plan to add UI" and click on finish.
5. The approuter module is added to the project and the mta.yml file is updated.
6. A new resource is added to the mta.yml file - 

    service: html5-apps-repo

    service-plan: app-runtime

I'd like to know why the html5-app-repo resource is added even though I chose not to add UI.

Thanks