add packer ubuntu board generator

packer/scripts/install-base.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+set -euxo pipefail
+
+echo "==> Setting nameserver"
+echo 'nameserver 8.8.8.8' > /etc/resolv.conf
+
+echo "==> installing base updates"
+apt-get -y update
+apt-get -y install ansible apt-transport-https ca-certificates
+apt-get -y clean