Add async action support

[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:

Closes #186

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/bookstack/v23.08.1-pkg-abf62b2e-dev-7245559a0085b0d51594e140e1ec1bcae76aff08-pr-187/index.html https://ci-tests.linuxserver.io/lspipepr/bookstack/v23.08.1-pkg-abf62b2e-dev-7245559a0085b0d51594e140e1ec1bcae76aff08-pr-187/shellcheck-result.xml	Tag	Passed
amd64-v23.08.1-pkg-abf62b2e-dev-7245559a0085b0d51594e140e1ec1bcae76aff08-pr-187	✅
arm64v8-v23.08.1-pkg-abf62b2e-dev-7245559a0085b0d51594e140e1ec1bcae76aff08-pr-187	✅