Please do not open private threads unless you need to share private information.

Share your repo so we can advise further.

I am sorry but why i need to share my repo with everybody?

So that we can provide assistance on what you have incorrectly set up.

Without that we aren't able to help here.

so if i want to use your service i need to share my code with everybody?

or i need to by a description to get privet help?

Private help threads are for sensitive information such as billing, not for questions on how to run a website on Railway.

I understand you may not want to share a repo publicly and that's fine, instead, you can share a minimal reproducible example.

Since this is not a platform issue but a problem with your project, we will need something that can be deployed that shows this error to be of any help here.

ok my problem is with generate a domain on deployed website i do not know what port to choose so what code i need to share ?

You would need to share your repo, or a minimal reproducible example.