Hello everyone, i'm trying to switch my dynamic client side rendered page into a Incremental Static Regenerated page (ISR).

When i'm in dev mode it works fine, but this error comes only when i run pnpm run build.

This is my Client Side version (that works in prod.):

export async function getServerSideProps({ params }) {
const { slug } = params;
const res = await fetch(${process.env.CONTENTS_API_URL}?slug=${slug});
const data = await res.json();

if (data.length === 0) {
return {
notFound: true,
};
}

return {
props: { data: data[0] },
};
}

This is the code that i'm trying to make it work for the ISR (it doesn't work in prod.):

https://hastebin.skyra.pw/obubowenoz.ts

And this is the error i get whenever i run pnpm run build:

cause: Error: connect ECONNREFUSED ::1:3000
at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1494:16) {
errno: -4078,
code: 'ECONNREFUSED',
syscall: 'connect',
address: '::1',
port: 3000
}
}

Build error occurred
Error: Failed to collect page data for /content/[slug]
at D:\Programmi\Axira\reep-demo1\node_modules.pnpm\next@13.4.4_react-dom@18.2.0_react@18.2.0\node_modules\next\dist\build\utils.js:1155:15
at process.processTicksAndRejections (node:internal/process/task_queues:95:5) {
type: 'Error'
}

I Was thinking: what if this problem occurs because the data that nextjs needs to fetch isn't available because the api is located in the same website that is now offline because it needs to build?

Maybe this could be the problem but i don't know how to fix it
Could someone Help me please?
Thanks in advance!