Docs: upgrade minumum Node.js version in the docs

[Amasoken]

What is the improvement or update you wish to see?

Currently the minimum version of Node.js is specified in the docs as 14.0.0 or 14.6.0:

• Upgrade Guide
  The minimum Node.js version has been bumped from 12.22.0 to 14.0.0, since 12.x has reached end-of-life.
• System Requirements
  Node.js 14.6.0 or newer

I've been using Node.js v14.17.6 and I've run into the issue with middleware which is described in the section below.
I've spent some time trying to resolve the issue. After that I've checked the specified minimum Node.js versions and my Node.js was above the minimum so I didn't think it was a problem with Node.
After some more digging I've upgraded Node.js to v14.18.0 and it worked.

I think it would be good to specify the actual required minimum version in the docs that works with Next.js 13

Is there any context that might help us understand?

The issue is present on the Node.js v14.17.6 and below, including the minimum v14.6.0. Checked on Next.js 13.0.2 and 13.0.3-canary.3
It seems to work fine on the Node.js v14.18.0 and above.

Steps to reproduce:

• Create a Next.js project from the standard template yarn create next-app
• Add middleware.ts file with the simple middleware:

import { NextResponse } from 'next/server';
import type { NextRequest } from 'next/server';

export const middleware = async (req: NextRequest) => {
    console.log('Got request in the middleware');

    return NextResponse.next();
};

export const config = {
    matcher: '/api/:path*',
};

• Start the app using yarn dev
• Try to access the api route http://localhost:3000/api/hello

After that there's a following error:

Error [TypeError]: Class extends value undefined is not a constructor or null
      at ../../node_modules/.pnpm/undici@5.11.0/node_modules/undici/lib/fetch/file.js (evalmachine.<anonymous>:5724:19)
      at __require (evalmachine.<anonymous>:14:50)
      at ../../node_modules/.pnpm/undici@5.11.0/node_modules/undici/lib/fetch/formdata.js (evalmachine.<anonymous>:5881:49)
      at __require (evalmachine.<anonymous>:14:50)
      at ../../node_modules/.pnpm/undici@5.11.0/node_modules/undici/lib/fetch/body.js (evalmachine.<anonymous>:6094:35)
      at __require (evalmachine.<anonymous>:14:50)
      at ../../node_modules/.pnpm/undici@5.11.0/node_modules/undici/lib/fetch/response.js (evalmachine.<anonymous>:6510:49)
      at __require (evalmachine.<anonymous>:14:50)
      at <unknown> (evalmachine.<anonymous>:11635:30)
      at requireFn (file://R:\work\_tmp\video-api-tiktok\node_modules\next\dist\compiled\edge-runtime\index.js:1:7079) {
    middleware: true
  }

Error disappears after upgrading the Node.js to v14.18.0

Does the docs page already exist? Please link to it.

https://nextjs.org/docs

[balazsorban44]

Hi, this rather seems like a bug, introduced in #41987.

[bayram00]

@Amasoken i faced the same problem and i solved it thanks

[github-actions]

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