HTML Templates with rhino

[Ifitrains]

Hi,

thank you for the great package!

Is there a good way to incorporate HTML templates (e.g. for a landing page) in rhino? I tried to modify the app.R function, e.g.

  shiny::shinyApp(
    ui =   htmltools::htmlTemplate(
      filename = "app/index.html",
      my_apps_ui = with_head_tags(main$ui)
    ),
    server = main$server
  )

but I get only "type closure" errors. Thank you for any hints :)