resolvconf package is required for setting wg client systemd unit in ubuntu
see the systemd error below
Oct 17 12:11:39 Asus-VivoBook wg-quick[25620]: [#] ip link add wg0 type wireguard
Oct 17 12:11:39 Asus-VivoBook wg-quick[25620]: [#] wg setconf wg0 /dev/fd/63
Oct 17 12:11:39 Asus-VivoBook wg-quick[25620]: [#] ip -4 address add 10.9.0.3/24 dev wg0
Oct 17 12:11:39 Asus-VivoBook wg-quick[25620]: [#] ip link set mtu 1420 up dev wg0
Oct 17 12:11:39 Asus-VivoBook wg-quick[25620]: [#] resolvconf -a wg0 -m 0 -x
Oct 17 12:11:39 Asus-VivoBook wg-quick[25620]: /usr/bin/wg-quick: line 31: resolvconf: command not found
Oct 17 12:11:39 Asus-VivoBook wg-quick[25620]: [#] ip link delete dev wg0
Oct 17 12:11:39 Asus-VivoBook systemd[1]: wg-quick@wg0.service: Main process exited, code=exited, status=127/n/a
Oct 17 12:11:39 Asus-VivoBook systemd[1]: wg-quick@wg0.service: Failed with result 'exit-code'.
Oct 17 12:11:39 Asus-VivoBook systemd[1]: Failed to start WireGuard via wg-quick(8) for wg0.
resolvconf package is required for setting wg client systemd unit in ubuntu
see the systemd error below