chore: pipe the webServer output for cloudflare playwright runs

[dario-piotrowicz]

Description

As I've mentioned here: #7947 (comment) I'm updating the playwright config to expose the stdout for Cloudflare runs.

This can be a bit noisy but I think the extra info that we can get out of the stdout in case of issues will definitely make it worth it (since as you can see from this run: Cloudflare Playwright CI run we are not getting much info when actual issues occur during the build process).

Validation

Validated in this PR, I've purposely broken the open-next preview: 8938872 and then run the playwright e2es:

• with stdout piping: https://github.com/nodejs/nodejs.org/actions/runs/16078376467/job/45378516249
• without stdout piping: https://github.com/nodejs/nodejs.org/actions/runs/16078442484/job/45378702367

As you can see with the output with stdout piping the error is visible in the CI run while without piping it is not.

Related Issues

Check List

• I have read the Contributing Guidelines and made commit messages that follow the guideline.
• I have run pnpm format to ensure the code follows the style guide.
• I have run pnpm test to check if all tests are passing.
• I have run pnpm build to check if the website builds without errors.
• I've covered new added functionality with unit tests if necessary.

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Name	Status	Preview	Updated (UTC)
nodejs-org	✅ Ready (Inspect)	Visit Preview	Jul 4, 2025 5:21pm

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.37%. Comparing base (4ebead0) to head (8a05a75).

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7951      +/-   ##
==========================================
- Coverage   75.42%   75.37%   -0.05%     
==========================================
  Files          96       96              
  Lines        8354     8354              
  Branches      219      220       +1     
==========================================
- Hits         6301     6297       -4     
- Misses       2051     2055       +4     
  Partials        2        2              

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[Copilot]

Pull Request Overview

A succinct update to enable Playwright’s webServer stdout piping during Cloudflare preview runs for better CI diagnostics.

• Adds stdout: 'pipe' to the Playwright webServer config when PLAYWRIGHT_RUN_CLOUDFLARE_PREVIEW is set
• Aims to surface server logs in CI for easier debugging of build and test failures