💻 feat: added env updater script

[kurtseifried]

Pull Request Template

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Summary

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Change Type

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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update
• Translation update

Testing

Please describe your test process and include instructions so that we can reproduce your test. If there are any important variables for your testing configuration, list them here.

Test Configuration:

tested various combinations of .env files/env variables, this is an add on utility helper script and doesn't affect LibreChat per see, it just makes it easier to setup a working .env based on your env variable.

Checklist

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• My code adheres to this project's style guidelines
• I have performed a self-review of my own code
• I have commented in any complex areas of my code
• I have made pertinent documentation changes
• My changes do not introduce new warnings
• I have written tests demonstrating that my changes are effective or that my feature works
• Local unit tests pass with my changes
• Any changes dependent on mine have been merged and published in downstream modules.
• A pull request for updating the documentation has been submitted.

I'm not sure on the docs for this, e.g. https://github.com/danny-avila/LibreChat/tree/main/utils/docker/*.sh doesn't have any docs.