How To: Install on True NAS

Calibre-Web Installation on TrueNAS Core 12:

Install Calibre-Web from the Community collection in the Plugins panel
Keep the POST INSTALL NOTES for further use
Click on MANAGE to open your Calibre-Web (the credentials are written in the notes you just kept in the format [username]:[password])
Now we're going to add our database (library). Go to the Storage / Pools panel and on your pool add a dataset (with SMB share type)
Go to Sharing / SMB / Add and add Calibre
Make sure SMB is enabled on the Services panel
Go back to the Storage / Pools, click on the vertical '...' of the Calibre dataset and click on Edit Permissions:

DELETE all items on Access Control List section
Add an item with who at User, Permissions at Full Control and User at (your ID on the notes, mine is 488) (it shows you an error message on the User but it works for me)
Add an item for you with your personal user or group (Permissions at Full Control)
Turn on Apply permissions recursively
Save

Now we will link this dataset with Calibre-Web (every plugin is into a 'jail', like Docker so we can not go to the good path directly). Turn off the Calibre by clicking on the STOP button
Go to the Jails panel, open calibre jail and click on MOUNT POINTS
On the ACTIONS button, click on ADD

Then select Calibre as the source and a new folder as the destination (just type with the keyboard the folder you want)
In this tutorial the destination/mnt/test/iocage/jails/calibre/root/library is used
Hit SUBMIT

Go on the Calibre Desktop App (on your Windows or Linux) and click on Library / Change/Create a library Alternativly copy an already existing library to your NAS
Select \\[servername or ip]\[calibre dataset] and check Create
Add every book you want
START Calibre-Web and click on MANAGE to go to the main page. After login, enter the Location of Calibre database. If you followed the tutorial exactly it's /library
You should already see every book you have