build: update Node version of local-example 🛠

[ejithon]

Summary

The base image for the example Dockerfile has been updated from Node.js version 16 to version 22.

A changeset file is not needed for this PR as this change will only affect local developers.
The actual demo server uses the Dockerfile located in the example/nodejs directory.

Reference(s)

N/A

Checklist

• changeset file(s) included

[changeset-bot]

⚠️ No Changeset found

Latest commit: 5427211

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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