NestJS app - no access to server with Railway domain

I have a super simple NestJS app, and I must be missing something. I have another NestJS app that this works fine on... I'm just trying to setup a simple swagger UI install first, and it's working on my localhost, but I can't seem to visit it on the railway domain. I included my main.ts file.... is something wrong with my strategy?

Solution:

please read this section https://docs.railway.app/guides/fixing-common-errors#node--nest

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