Describe the bug
Calibre Web is not actually stand alone requires a database which is normally created by Calibre to work.

To Reproduce
Steps to reproduce the behavior:
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Expected behavior
I think a new user would expect it to "just work". Ideally this could be provided when installing Calibre Web but that might be an issue to implement. If so perhaps it could be made more clear it requires the database to be created first. An initial DB can be downloaded here https://drive.google.com/file/d/189tv5i5SNT6rivLLLvCmC2JeLtODmSS1/view .

Screenshots
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Portainer Logs
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