Fix Playwright port conflict in CI by disabling webServer auto-start

[Copilot]

CI workflow fails with "port 3000 already in use" because the workflow manually starts netlify dev --port 8888 while Playwright config attempts to auto-start a second server on port 3000.

Changes

playwright.config.ts

• Conditionally disable webServer in CI environments where the workflow pre-starts the server
• Enable reuseExistingServer: true for local development to prevent conflicts

webServer: process.env.CI ? undefined : {
  command: 'npm run dev',
  url: 'http://localhost:3000',
  reuseExistingServer: true,
  // ...
}

Documentation

• e2e/README.md: Updated CI behavior and troubleshooting for port conflicts
• CHANGELOG.md: Added entry documenting the fix

Behavior

• CI: Uses workflow-managed netlify dev on port 8888 via BASE_URL env var
• Local: Auto-starts Next.js on port 3000 with server reuse enabled

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• esm.ubuntu.com
  • Triggering command: /usr/lib/apt/methods/https (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

Important Execution Steps:

Actions such as checkout, setup-node, installing dependencies and Playwright browsers, and environment checks ran successfully.
The system verified readiness of local dev server at http://localhost:8888.
Functions and TypeScript compilation steps succeeded.
The Playwright E2E test step failed due to a port conflict:
Error: http://localhost:3000 is already used, make sure that nothing is running on the port/url or set reuseExistingServer:true in config.webServer.
This error repeated, which led to the test job failing with exit code 1 and the workflow stopping.
Summary of Errors and Warnings:

The primary cause was a port usage conflict on localhost:3000. The Playwright config did not specify reuseExistingServer:true or ensure the port was free before launching tests.
Action Required: Before rerunning this workflow:
Ensure no existing instance is running on port 3000, or
Set reuseExistingServer:true in Playwright’s configuration under config.webServer to allow port sharing during tests.
Conclusion:
While the intended code fix was set up for testing, the end-to-end tests did not execute due to an environment setup issue, not a code failure. Addressing the port usage will enable the tests to proceed and properly validate the code change.

Recommendation:

Adjust the Playwright configuration or free up port 3000, then re-run the workflow to confirm successful testing of the fix.

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💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[netlify]

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[DHCross]

I'm having Codex take a look