How to do subdomain to subpath redirect / url rewrite in Next.js?

I have this rewrite in next.config.js:

async rewrites() {
    return [
        {
            source: 'https://:postOrProgramId*.tikex-dev.com/',
            destination: 'https://tikex-dev.com/:postOrProgramId*',
        },
    ]
},

But it does not work.

I would do rewrite like this amazing-campaign-in-nyc.tikex-dev.com -> tikex-dev.com/amazing-campaign-in-nyc

Unfortunatelly when I run locally, I got this error, though I know it does not support localhost now.

`source` does not start with / for route {"source":"https://:postOrProgramId*.tikex-dev.com/","destination":"https://tikex-dev.com/:postOrProgramId*"}

Yes, source does not starts with / as I would expect first the protocol and then subdomain name comes. Is protocol + subdomain name not part of the source?

I am not sure, I need : before the variable and * after it? How can I express subdomain to subpath redirect?

I have an other reverseproxy rewrite. Do I have to worry about the two will interfere?

{
    source: '/api/:path*',
    destination: `${
        true
            ? `https://api.tikex-${
                    process.env.NEXT_PUBLIC_ENVIRONMENT ?? 'dev'
              }.com/`
            : 'http://localhost:8080/'
    }:path*`,
},