Enhance compatibility with Docker locally for E2E

[aaemnnosttv]

Feature Description

Newer versions of Docker Desktop don't expose the default socket (/var/run/docker.socket) by default

If disabled, this will cause E2E test runs to fail without an obvious reason as it is expected to exist since E2E requires Docker.

---

Do not alter or remove anything below. The following sections will be managed by moderators only.

Acceptance criteria

• Local E2E runs should run consistently (not specifically pass), regardless of the "Allow default Docker socket to be used" setting
• If Docker cannot be communicated with, exit the process with an error message

Failed to connect to Docker with the following error: { message }

Implementation Brief

• Upgrade dockerode to the latest version (currently 4.0.2), as it will properly find the socket by default including better support cross-platform
• Remove the hardcoded socket path currently provided

  site-kit-wp/tests/e2e/config/wordpress-debug-log/index.js

  Line 35 in 64b8643

  const docker = new Docker( { socketPath: '/var/run/docker.sock' } );

• If Docker is unable to be communicated with, exit the process with a more informative error message as per AC

Test Coverage

• No changes – test infra

QA Brief

This can be tested a few ways

1. Edit tests/e2e/bin/test-docker-connectivity and give Docker a non-existent socket path, then run E2E as usual npm run test:e2e

- const docker = new Docker();
+ const docker = new Docker( { socketPath: '/non/existent' } );

2. Stop Docker entirely (engine) and run tests/e2e/bin/test-docker-connectivity. You should see the error message and a non-successful error code.

Changelog entry

• N/A

[10upsimon]

QA:ENG PASS

• ✅ Altered tests/e2e/bin/test-docker-connectivity and set non existent socket, const docker = new Docker( { socketPath: '/non/existent' } );
• ✅ Stopped Docker engine
• ✅ Executed tests/e2e/bin/test-docker-connectivity
• ✅Noted error message: Failed to connect to Docker from Node with message: "connect ENOENT /non/existent"