Add temporary DNS fix for VBox 7.2

Author: ripleymj

packer/http/oem-preseed.cfg

@@ -62,6 +62,7 @@ ubiquity ubiquity/success_command string svcfile="/target/etc/systemd/system/ssh
     echo "After=network-online.target"                                   >> "$svcfile"; \
     echo "Requires=network-online.target"                                >> "$svcfile"; \
     echo "[Service]"                                                     >> "$svcfile"; \
+    echo "ExecStartPre=/bin/bash -c 'echo nameserver 8.8.8.8 > /etc/resolv.conf'" >> "$svcfile"; \
     echo "ExecStartPre=/usr/bin/apt-get update"                          >> "$svcfile"; \
     echo "ExecStart=/usr/bin/apt-get -y install openssh-server"          >> "$svcfile"; \
     echo "ExecStartPost=/bin/systemctl disable ssh-install.service"      >> "$svcfile"; \