For DHCP setups DNS is delivered with the lease, but with a static IP the
container inherits /etc/resolv.conf from the PVE host - which is often
unreachable from the container's VLAN.
Changes:
- New NAMESERVER prompt (only shown for static IPs, defaults to gateway)
- pct create now passes --nameserver when set
- Network wait loop tests L3 and DNS separately so failures point at the
actual cause (no route to gateway vs. bad DNS server)
- Refactored pct create args into an array for cleaner conditional flags
HOSTNAME is a bash built-in always containing the host's name, so the
"-z HOSTNAME" check never fired and the prompt was silently skipped —
containers ended up named after the Proxmox host.
Also added an optional VLAN tag prompt (empty = no tag), and the network
wait loop now exits with an error if the network never comes up instead
of silently proceeding to a guaranteed-broken apt-get update.
l.kirchner