node 22 unsupported in vercel serverless adapter

[Trombach]

Astro Info

Astro                    v4.16.14
Node                     v22.10.0
System                   Linux (x64)
Package Manager          pnpm
Output                   hybrid
Adapter                  @astrojs/vercel/serverless
Integrations             @astrojs/tailwind
                         @astrojs/svelte
                         @astrojs/mdx
                         @astrojs/react
                         @astrojs/sitemap
                         @inox-tools/content-utils

Describe the Bug

Vercel has switched to node 22 being the default version: https://vercel.com/docs/functions/runtimes/node-js/node-js-versions. When attempting to deploy Astro with the serverless vercel adapter, the adapter defaults to version 18, because 20 is the latest known version in SUPPORTED_NODE_VERSIONS. This causes the deployment to fail.
Besides 22 being the default now, version 20 is still supported but hasn't been marked as deprecated yet. I would suggest to continue listing version 20 with { status: 'available' } in SUPPORTED_NODE_VERSIONS.

Happy to send a PR!

What's the expected result?

I should be able to deploy Astro to vercel serverless using node version 22.

Link to Minimal Reproducible Example

https://stackblitz.com/edit/github-96f9yd?file=package.json

Participation

• I am willing to submit a pull request for this issue.