Can't add `internal path` in preview deployments settings

[MGREMY]

To Reproduce

When you create an application (tied to GitHub repository), and you setup preview deployments, we can't change the internal path of the application.

Current vs. Expected behavior

Having the same option as when we add a domain, but for preview deployments

Provide environment information

OS:
  Debian Trixie 13
  AMD64
Dockploy 0.28.4
VPS Provider : OVH
Deploying Angular application (with AnalogJS and vite)

Which area(s) are affected? (Select all that apply)

Application

Are you deploying the applications where Dokploy is installed or on a remote server?

Both

Additional context

No response

Will you send a PR to fix it?

No