Fix v4 build issues.

[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/grocy/v4.0.0-pkg-4ff8adce-dev-1dc037e328964697496873e3608e14696bdea460-pr-69/index.html https://ci-tests.linuxserver.io/lspipepr/grocy/v4.0.0-pkg-4ff8adce-dev-1dc037e328964697496873e3608e14696bdea460-pr-69/shellcheck-result.xml	Tag	Passed
amd64-v4.0.0-pkg-4ff8adce-dev-1dc037e328964697496873e3608e14696bdea460-pr-69	✅
arm64v8-v4.0.0-pkg-4ff8adce-dev-1dc037e328964697496873e3608e14696bdea460-pr-69	✅

[aptalca]

Let's hope it doesn't need to write anything to the app folder

[thespad]

I did a bunch of basic sanity testing and didn't run into any issues.