format3.md

{
  "join-policy": "none|simple|gs-unit-chain",
  "units": [
    {
      "name": "ambassador",
      "type": "ambassador",
      "definition": {
        "dependency": "app",
        "port": 80
      }
    },
    {
      "name": "user-app",
      "type": "service",
      "definition": {
        "unit": {
          "description": "description"
        },
        "service": {
          "type": "simple"
        },
        "fleet": {
          "global": true
        }
      }
    },
    {
      "name": "lb-register",
      "type": "lb-register",
      "definition": {
        "port": 80,
        "lb-visibility": "public"
      }
    }
  }
}