Add packer scripts to build mosk image

Automate steps with building image for virtual mosk deployments.

Related-Prod: PRODX-35395
Change-Id: Ideff56310d153ceb034899f2efd8995f930e65d9
diff --git a/mosk-images/build_image.sh b/mosk-images/build_image.sh
new file mode 100755
index 0000000..10450a8
--- /dev/null
+++ b/mosk-images/build_image.sh
@@ -0,0 +1,18 @@
+#!/bin/bash
+set -ex
+
+export ENVIRONMENT=${ENVIRONMENT:-'mosk-23.3'}
+
+source env/${ENVIRONMENT}.sh
+export VM_NAME=${VM_NAME:-"${ENVIRONMENT}-amd64-$(date +"%Y%m%d%H%M%S").qcow2"}
+
+export PACKER_LOG=1
+export PACKER_IMAGES_CACHE="./packer_images_cache"
+mkdir -p "${PACKER_IMAGES_CACHE}"
+
+PACKER_BINARY=${PACKER_BINARY:-"$(which packer)"}
+
+
+./config_drive.sh
+
+$PACKER_BINARY build -on-error=abort template.json