Prepare a release system for OVF images

[teon]

OVF is an open standard well documented of virtual images.
Some of our customer would like to have those images to easly and quickly deploy defguard in their infrastructure on Proxmox/VMWARE/etc..

Steps to prepare the pipeline:

• research ways of automated OVF building methods
• implement POC OVF building for one of the components
• Build a single OVF that is configured by cloud-init:
  • if it's a gateway, proxy, core...
  • Default mode (if no cloud-init options are given) is to start docker compose with all components and automatically adopt GW & Edge - "one liner" wizzard
    • Cloud init options to determine if we should start: core/edge/gw
  • network config through cloud-init

The current POC is available in the deployment repository: https://github.com/DefGuard/deployment/tree/ovf/ovf