Support Node v20 in Vercel adapter

[shishkin]

Astro Info

Astro                    v4.0.3
Node                     v20.10.0
System                   macOS (arm64)
Package Manager          npm
Output                   static
Adapter                  none (it's @astrojs/vercel 6.0.1 in real deployment)
Integrations             none

If this issue only occurs in one browser, which browser is a problem?

No response

Describe the Bug

Astro fails to deploy on Vercel with Node 20 runtime configured:

[20:32:36.245] 19:32:36 [build] Complete!
[20:32:36.315] Build Completed in /vercel/output [51s]
[20:32:36.519] Deploying outputs...
[20:32:36.529] Error: The following Serverless Functions contain an invalid "runtime":
[20:32:36.529]   - render (nodejs18.x). Learn More: https://vercel.com/guides/serverless-function-contains-invalid-runtime-error

In a local build, adapter warns about Node 20 not supported (due to this hardcoded list of supported version).

What's the expected result?

If there are no known issues, Node 20 should be added to the supported list.

Link to Minimal Reproducible Example

not reproducible on stackblitz, the issue is only on vercel

Participation

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

[matthewp]

Can you submit a PR for this? Thanks!

[jacobdalamb]

Node 20x is in beta currently in Vercel.

[shishkin]

@matthewp Probably should have done it upfront. @jacobdalamb was first :)

@jacobdalamb yes, I have and got the error in the output as described above.

[jacobdalamb]

Adapter none (it's @astrojs/vercel 6.0.1 in real deployment)

I don't understand this part. Is @astrojs/vercel installed in your project?

[shishkin]

Yes, I have @astrojs/[email protected] installed in my project. I think I ran astro info in a repo root instead of the web package.

[shishkin]

@jacobdalamb your PR should fix the issue according to the runtime selection logic here. Once Node 20 is in the supported list, it should be used instead of defaulting to 18.