Resize LXC container on Proxmox

pct stop <id>
vzdump <id> -storage local -compress lzo
pct destroy <id>
pct restore <id> /var/lib/vz/dump/vzdump-lxc-<id>...tar.lzo --rootfs 30 --unprivileged --storage <storage-name>
## Resize the disk to 30Gb