add system info

broadcast/broadcast.go

@@ -192,11 +192,11 @@ func constructSystemInfo() map[string]interface{} {
 	usedDisk, freeDisk := system.GetDisk()
 	diskObj = append(diskObj,usedDisk,freeDisk)
 	res = map[string]interface{}{
-		"system":map[string]interface{}{
-			"usage":map[string]interface{}{
-				"ram":ramObj,
-				"cpu":cpuUsage,
-				"disk":diskObj,
+		"System":map[string]interface{}{
+			"Usage":map[string]interface{}{
+				"RAM":ramObj,
+				"CPU":cpuUsage,
+				"Disk":diskObj,
 			},
 		},
 	}