Fix linting, remove nc

[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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[LinuxServer-CI]

I am a bot, here are the test results for this PR: https://ci-tests.linuxserver.io/lspipepr/hedgedoc/1.9.9-pkg-9f950cbf-dev-61d7231b0688258c4ae27a01121a5b1225491b17-pr-43/index.html https://ci-tests.linuxserver.io/lspipepr/hedgedoc/1.9.9-pkg-9f950cbf-dev-61d7231b0688258c4ae27a01121a5b1225491b17-pr-43/shellcheck-result.xml	Tag	Passed
amd64-1.9.9-pkg-9f950cbf-dev-61d7231b0688258c4ae27a01121a5b1225491b17-pr-43	✅
arm64v8-1.9.9-pkg-9f950cbf-dev-61d7231b0688258c4ae27a01121a5b1225491b17-pr-43	✅