Check config file for site_root as well as env

[thespad]

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• [x] I have read the contributing guideline and understand that I have made the correct modifications

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Description:

Benefits of this PR and context:

How Has This Been Tested?

Source / References:

[LinuxServer-CI]

I am a bot, here are the test results for this PR: https://ci-tests.linuxserver.io/lspipepr/healthchecks/v3.1-pkg-01c54127-dev-5d225cbda283cc154a7a1398c8f3df4c6a96239d-pr-116/index.html https://ci-tests.linuxserver.io/lspipepr/healthchecks/v3.1-pkg-01c54127-dev-5d225cbda283cc154a7a1398c8f3df4c6a96239d-pr-116/shellcheck-result.xml	Tag	Passed
amd64-v3.1-pkg-01c54127-dev-5d225cbda283cc154a7a1398c8f3df4c6a96239d-pr-116	✅
arm64v8-v3.1-pkg-01c54127-dev-5d225cbda283cc154a7a1398c8f3df4c6a96239d-pr-116	❌

[LinuxServer-CI]

I am a bot, here are the test results for this PR: https://ci-tests.linuxserver.io/lspipepr/healthchecks/v3.1-pkg-01c54127-dev-735544d5bc47c28d58fd02d148a71cec9f9a6c59-pr-116/index.html https://ci-tests.linuxserver.io/lspipepr/healthchecks/v3.1-pkg-01c54127-dev-735544d5bc47c28d58fd02d148a71cec9f9a6c59-pr-116/shellcheck-result.xml	Tag	Passed
amd64-v3.1-pkg-01c54127-dev-735544d5bc47c28d58fd02d148a71cec9f9a6c59-pr-116	✅
arm64v8-v3.1-pkg-01c54127-dev-735544d5bc47c28d58fd02d148a71cec9f9a6c59-pr-116	❌

[LinuxServer-CI]

I am a bot, here are the test results for this PR: https://ci-tests.linuxserver.io/lspipepr/healthchecks/v3.1-pkg-01c54127-dev-d6c2fc0b92496939a88945be97d806b97fa7dfed-pr-116/index.html https://ci-tests.linuxserver.io/lspipepr/healthchecks/v3.1-pkg-01c54127-dev-d6c2fc0b92496939a88945be97d806b97fa7dfed-pr-116/shellcheck-result.xml	Tag	Passed
amd64-v3.1-pkg-01c54127-dev-d6c2fc0b92496939a88945be97d806b97fa7dfed-pr-116	✅
arm64v8-v3.1-pkg-01c54127-dev-d6c2fc0b92496939a88945be97d806b97fa7dfed-pr-116	❌