I think that you can use TrueNAS to host webservers, but it is not necessarily the right tool for the job (especially if you are running TrueNAS core on it), as, like you mentioned, it is ZFS/storage first.I just used it to help host downloads for the new tf2c update. can you still run webservers on truenas or no?
edit, just actually looked at it and it seems like that wouldnt be an option? given that its just used for storage and im already using samba on it, which, though probably much worse, already does a similar job. hmmm...