4.) Components

[
    { 
    	"key": "mongodb", 
    	"label": "MongoDB",
    	"standalone": true,
    	"persisted": true
    },
    { 
    	"key": "rabbitmq",
    	"label": "RabbitMQ",
    	"standalone": true,
    	"persisted": false,
    	"links": {
    		"optional": [ 
    			"image-preview:clowder",
    			"video-preview:clowder",
    			"plantcv:clowder",
    			"clowder"
    		]
    	}
    },
    {
    	"key": "clowder",
    	"label": "Clowder",
    	"standalone": false,
    	"persisted": false,
    	"links": {
    		"required": [
    			"mongodb"
    		],
    		"optional": [
    			"image-preview:rabbitmq",
    			"elasticsearch",
    			"rabbitmq"
    		]
    	}
    },
    { 
    	"key": "elasticsearch",
    	"label": "ElasticSearch",
    	"standalone": true,
    	"persisted": false,
    	"links": {
    		"optional": [
    			"clowder"
    		]
    	}
    },
	{
		"key": "image-preview",
		"label": "Image Preview",
    	"standalone": true,
    	"persisted": false,
		"links": {
			"optional": [
				"clowder:rabbitmq"
			]
		}
	},
	{
		"key": "video-preview",
		"label": "Video Preview",
    	"standalone": true,
    	"persisted": false,
		"links": {
			"optional": [
				"clowder:rabbitmq"
			]
		}
	},
	{
		"key": "plantcv",
		"label": "PlantCV",
    	"standalone": true,
    	"persisted": false,
		"links": {
			"optional": [
				"clowder:rabbitmq"
			]
		}
	},
	{
		"key": "dataverse",
		"label": "DataVerse",
    	"standalone": false,
    	"persisted": false,
		"links": {
			"required": [
				"rserve",
				"solr",
				"tworavens",
				"postgresql"
			]
		}
	},
	{
		"key": "postgresql",
		"label": "PostgreSQL",
		"standalone": true,
		"persisted": true
	}
	{
		"key": "rserve",
		"label": "RServe",
    	"standalone": false,
    	"persisted": false
	},
	{
		"key": "solr",
		"label": "Solr",
    	"standalone": false,
    	"persisted": false
	},
	{
		"key": "tworavens",
		"label": "Two Ravens",
    	"standalone": false,
    	"persisted": false
	}
]