Debug attach template still asking for a file to run

[jarodevs]

I am currently testing out dap-mode in a typescript nodejs environment. I manage to make it work with the following:

Have the server running with a dap socket open

Setting up a dap-debug-template accordingly

(dap-register-debug-template
  "Test attach"
  (list :name "Test attach"
        :type "node"
        :request "attach"
        :port 9229))

Next step is placing a line break on this piece of code: (it's in green)

Finally running dap-debug gives sequentially

1. Select template
   
2. Select file to run and here is my problem:
   

In this case I could select any of the 3 options, the debugger would attach successfully. I am just wondering if I am miscomprehending the prompt here or it just should not be here.
I though it would only be necessary if I had to specify from which file I would want to run the debugger but since here I am only attaching it makes me wonder.

Thanks for your work!

NB: I am new to emacs-lisp, if there would be any guidelines into how I should go myself in the code to understand how this works I would gladly do so.