Iocage Calibre-Web plugin for freenas.

The relevant details are:

The default admin credentials are "admin:admin123"
The config folder is "/usr/local/etc/calibre-web"
By default the log file is created in the config folder, but you can change the logfile path to "/var/log/calibre-web/calibre-web.log"
The Calibre E-Book Converter path is "/usr/local/bin/ebook-convert"
The unrar binary path is "/usr/local/bin/unrar"
The user running Calibre-Web is "calibreweb" (ID 488)
Calibre-Web can be updated using either the built-in admin console or the Plugin update command.

Testing manually

In freenas shell run:

fetch https://raw.githubusercontent.com/ix-plugin-hub/iocage-plugin-index/master/calibre-web.json
iocage fetch -P calibre-web.json --name calibre-web dhcp=on --branch 'test'

Change the user that runs the service (from root to calibreweb)
Add settings (like https://github.com/timsavage/iocage-plugin-dnsmasq or https://github.com/gitbulb/iocage-plugin-openvpn) when available in Freenas UI