feat(dashboard): add health status to home page and dashboard (#3489)

* feat(dashboard): add health status to home page and dashboard

* fix(dashboard): code review updates, using builtin for substring search

api/docker/snapshot.go

@@ -3,6 +3,7 @@ package docker
 import (
 	"context"
 	"log"
+	"strings"
 	"time"
 
 	"github.com/docker/docker/api/types"
@@ -126,6 +127,8 @@ func snapshotContainers(snapshot *portainer.Snapshot, cli *client.Client) error
 
 	runningContainers := 0
 	stoppedContainers := 0
+	healthyContainers := 0
+	unhealthyContainers := 0
 	stacks := make(map[string]struct{})
 	for _, container := range containers {
 		if container.State == "exited" {
@@ -134,6 +137,12 @@ func snapshotContainers(snapshot *portainer.Snapshot, cli *client.Client) error
 			runningContainers++
 		}
 
+		if strings.Contains(container.Status, "(healthy)") {
+			healthyContainers++
+		} else if strings.Contains(container.Status, "(unhealthy)") {
+			unhealthyContainers++
+		}
+
 		for k, v := range container.Labels {
 			if k == "com.docker.compose.project" {
 				stacks[v] = struct{}{}
@@ -143,6 +152,8 @@ func snapshotContainers(snapshot *portainer.Snapshot, cli *client.Client) error
 
 	snapshot.RunningContainerCount = runningContainers
 	snapshot.StoppedContainerCount = stoppedContainers
+	snapshot.HealthyContainerCount = healthyContainers
+	snapshot.UnhealthyContainerCount = unhealthyContainers
 	snapshot.StackCount += len(stacks)
 	snapshot.SnapshotRaw.Containers = containers
 	return nil