[Packer](https://www.packer.io/) is a server imaging tool developed by HashiCorp. Server imaging, or immutable infrastructure, is a popular alternative to runtime configuration tools, such as Ansible or Puppet. It is based on the idea that once a server is deployed, you never change it; instead, you deploy a _new_ server with your changes and then tear down the old one. This makes server maintenance easier and allows you to scale across a large number of machines more efficiently. Packer support......