Updates environment files documentation

[Haimantika]

Why: Adds more information about environment files

Closes: #31568

What's being changed (if available, include any code snippets, screenshots, or gifs):

Adds example about how .env file can be used.

Check off the following:

• I have reviewed my changes in staging, available via the View deployment link in this PR's timeline (this link will be available after opening the PR).

  • For content changes, you will also see an automatically generated comment with links directly to pages you've modified. The comment won't appear if your PR only edits files in the data directory.

• For content changes, I have completed the self-review checklist.

[github-actions]

Automatically generated comment ℹ️

This comment is automatically generated and will be overwritten every time changes are committed to this branch.

The table contains an overview of files in the content directory that have been changed in this pull request. It's provided to make it easy to review your changes on the staging site. Please note that changes to the data directory will not show up in this table.

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Content directory changes

You may find it useful to copy this table into the pull request summary. There you can edit it to share links to important articles or changes and to give a high-level overview of how the changes in your pull request support the overall goals of the pull request.

Source	Preview	Production	What Changed
actions/using-workflows/workflow-commands-for-github-actions.md	fpt ghec ghes@ 3.13 3.12 3.11 3.10 3.9	fpt ghec ghes@ 3.13 3.12 3.11 3.10 3.9

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fpt: Free, Pro, Team
ghec: GitHub Enterprise Cloud
ghes: GitHub Enterprise Server

[Haimantika]

From what I understand, the errors are occurring because of the mention of GitHub docs link. Not sure how to solve that.

[nguyenalex836]

@Haimantika Thanks so much for opening a PR! I'll get this triaged for review ✨ We will take a look at that failed deployment check on our end 💛

[Haimantika]

@Haimantika Thanks so much for opening a PR! I'll get this triaged for review ✨ We will take a look at that failed deployment check on our end 💛

Let me know if you have any feedback on the PR :)

[Haimantika]

Hi @nguyenalex836 is there any changes needed from my end?

[nguyenalex836]

@Haimantika Hello! No changes needed from you currently ✨ Once our team is able to review your PR, you will be the first to know 💛 thank you!

[Haimantika]

@Haimantika Hello! No changes needed from you currently ✨ Once our team is able to review your PR, you will be the first to know 💛 thank you!

Thanks for the update!