Have you read the Contributing Guidelines on issues?

• I have read the Contributing Guidelines on issues.

Prerequisites

• I'm using the latest version of Docusaurus.
• I have tried the npm run clear or yarn clear command.
• I have tried rm -rf node_modules yarn.lock package-lock.json and re-installing packages.
• I have tried creating a repro with https://new.docusaurus.io.
• I have read the console error message carefully (if applicable).

Description

When starting a dev server of the latest version of Node (v22.1.0) and Docusaurus (v3.3.2) with npm start (docusaurus start) I'll get the following warning:

DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead.

This is due to the fact that docusaurus/core has serve-handler as a dependency.
And serve-handler itself depends on fast-url-parser which seems to be the root cause of this warning.

Is there anything Docusaurus can do to fix this or does the serve-handler project have to refactor its code from fast-url-parser to Node's native url module instead?

Reproducible demo

No response

Steps to reproduce

npx create-docusaurus@latest my-website classic
cd my-website
npm run start

Expected behavior

Don't show any warnings in the console.

Actual behavior

When starting a dev server of the latest version of Node (v22.1.0) and Docusaurus (v3.3.2) with npm start (docusaurus start) I'll get the following warning:

DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead.

Your environment

No response

Self-service

• I'd be willing to fix this bug myself.