Verify sync certificates are correctly exported to `output` for server installation in Multi-device setup.

If the installation is performed on a server, for the multi-device setup, verify that the files:

ca.cert.pem

<taskwarrior user>.cert.pem

<taskwarrior user>.key.pem

...

are indeed exported to the folder output in the repository.

Inspect the server multi-device installation flow and the repository's output folder, focusing on whether ca.cert.pem and the Taskwarrior user certificate and key are exported there. Done means the listed certificate files are present in output after a server multi-device installation.

Written by the indexing model from the issue text.