go-sundheit query health API

health-api-response.py

$ curl -i http://localhost:8080/admin/health.json
HTTP/1.1 200 OK
Content-Type: application/json
Date: Wed, 17 Jul 2019 12:54:20 GMT
Content-Length: 208

{
	"resolve.example.com": {
		"message": "[2] results were resolved",
		"timestamp": "2019-07-17T15:54:18.225468956+03:00",
		"duration": 1689142,
		"contiguousFailures": 0,
		"timeOfFirstFailure": null
	}
}