Feature/packer jenkins (#31)

* packer jenkins update

jenkins-packer-demo/scripts/jenkins-run-terraform.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+set -ex
+AWS_REGION="eu-west-1"
+cd jenkins-packer-demo
+S3_BUCKET=`aws s3 ls --region $AWS_REGION |grep terraform-state |tail -n1 |cut -d ' ' -f3`
+sed -i 's/terraform-state-xx70dpnh/'${S3_BUCKET}'/' backend.tf
+sed -i 's/#//g' backend.tf
+aws s3 cp s3://${S3_BUCKET}/amivar.tf amivar.tf --region $AWS_REGION
+terraform init
+terraform apply -auto-approve -var APP_INSTANCE_COUNT=1 -target aws_instance.app-instance