feat: add support for custom entry point

[KarpachMarko]

What is this PR about?

This PR will allow to configure custom Traefik entry point for applications domains, by manually entering name of Traefik entrypoint. That will prevent creating default entrypoints ("web" and/or "websecure") and only will use one, that is provided.

Checklist

Before submitting this PR, please make sure that:

• [x] You created a dedicated branch based on the canary branch.
• [x] You have read the suggestions in the CONTRIBUTING.md file https://github.com/Dokploy/dokploy/blob/canary/CONTRIBUTING.md#pull-request
• [x] You have tested this PR in your local instance.

Issues related (if applicable)

closes #2851

Screenshots (if applica

ble)