docs: fix path for .env

[SinghaAnirban005]

Closes #2615

✅ Checklist

• I have followed every step in the contributing guide
• The PR title follows the convention.
• I ran and tested the code works

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Changelog

Fixed the path to copy .env.example while inside the hello-world directory

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Latest commit: 8c0d56b

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[coderabbitai]

Walkthrough

A documentation update in CONTRIBUTING.md changes the environment setup command for the references/hello-world guide: the cp command now copies from ../../.env.example to .env instead of from .env.example to .env, adjusting the relative path used during CLI login environment setup.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Reasoning: Single-file documentation change limited to a path correction; review requires only verifying the relative path against the directory structure.

Pre-merge checks and finishing touches

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title Check	✅ Passed	The title "docs: fix path for .env" is concise and clearly summarizes the main change in the pull request. It uses the "docs:" prefix to indicate this is a documentation update and specifically references fixing a path related to .env configuration. The title is directly related to the core modification, which corrects the path used in the CONTRIBUTING.md file's environment setup instructions for the hello-world example.
Linked Issues Check	✅ Passed	The pull request directly addresses the objective from issue #2615 by correcting the file path in CONTRIBUTING.md for the manual testing setup. The raw summary confirms that the cp command path has been updated from .env.example to ../../.env.example, which ensures the command works correctly when executed from inside the references/hello-world directory as documented in step 4 of the First time setup section. This change directly resolves the reported bug regarding the incorrect path.
Out of Scope Changes Check	✅ Passed	The pull request contains only a single, focused change that updates the cp command path in the CONTRIBUTING.md documentation. This modification is directly scoped to resolving the bug described in issue #2615 without introducing any unrelated changes. The raw summary confirms no changes to exported or public entities, indicating the change is limited to documentation content and does not introduce scope creep.
Description Check	✅ Passed	The pull request description includes the essential required sections: a closes reference to issue #2615, a completed checklist with all items marked as done, and a concise changelog explaining the fix. While the Testing section from the template is not filled out, this is considered non-critical for a documentation fix that doesn't involve executable code changes. The author has confirmed testing was performed by checking the corresponding checkbox, and the description provides sufficient context about the change.
Docstring Coverage	✅ Passed	No functions found in the changes. Docstring coverage check skipped.

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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📜 Recent review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 3089013 and 8c0d56b.

📒 Files selected for processing (1)

• CONTRIBUTING.md (1 hunks)

🔇 Additional comments (1)

CONTRIBUTING.md (1)

112-112: Correct path for copying .env.example from hello-world directory.

The relative path correction from cp .env.example .env to cp ../../.env.example .env is accurate. Since this command is executed after cd references/hello-world (line 111), traversing up two levels to the repository root where .env.example resides is the proper relative path.

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