Custom sidebar component on Freedom-ui

Hello,

on freedom-ui, i would like to add a custom sidebar component, to handle phone calls notes.
When a call is over, the sidebar would open to let the user enter some notes about it.

So far i made an angular app to test, according to this guide :
https://academy.creatio.com/docs/8.x/dev/development-on-creatio-platfor…

Now that my angular app is ready to upload, it seems i can't do it because our creatio development instance is not deployed on-site : the system cannot be used with file system development.
(https://academy.creatio.com/docs/8.x/dev/development-on-creatio-platfor…)

Is there any workaround for this ?

Should i try to make it in a different way ?

Best regards.
Patrice