test(server): fully reset process.env to default after each test

[Fdawgs]

Checklist

• Run npm test
• Documentation has been updated and adheres to the style described in CONTRIBUTING.md
• Commit message adheres to the Conventional commits style, following the @commitlint/config-conventional config

[coveralls]

Pull Request Test Coverage Report for Build 7678147751

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall first build on test/server at 100.0%

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Totals
Change from base Build 7664898328:	100.0%
Covered Lines:	646
Relevant Lines:	646

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💛 - Coveralls