My storage is also mounted on the host.
I share it from the host with smb and for the LXC's I add the mount point from the GUI or from the terminal:
root@pve:~# pct set LXC_Number -mp0 /host_mountPoint,mp=/LXC_folder
I just installed docker until the hello-world docker run
test and everything was perfect!
I applied the good practices with the user and the folder permissions and there it is waiting for me to raise good containers.
Thank you for the guidance !!