Update go server (#13589)

### What problem does this PR solve?

1. Add more CLI command
2. Add some license hooks

### Type of change

- [x] New Feature (non-breaking change which adds functionality)
- [x] Refactoring

Signed-off-by: Jin Hai <haijin.chn@gmail.com>

cmd/admin_server.go

@@ -53,7 +53,7 @@ func main() {
 	flag.Parse()
 
 	// Initialize logger
-	if err := logger.Init("debug"); err != nil {
+	if err := logger.Init("info"); err != nil {
 		panic("failed to initialize logger: " + err.Error())
 	}
 

cmd/server_main.go

@@ -242,12 +242,11 @@ func startServer(config *server.Config) {
 	} else {
 		// Start heartbeat reporter with 30 seconds interval
 		heartbeatReporter := utility.NewScheduledTask("Heartbeat reporter", 3*time.Second, func() {
-			var message string
-			if err, message = heartbeatService.SendHeartbeat(); err == nil {
+			if err = heartbeatService.SendHeartbeat(); err == nil {
 				local.SetAdminStatus(0, "")
 			} else {
-				local.SetAdminStatus(1, message)
-				logger.Warn("Failed to send heartbeat", zap.Error(err))
+				local.SetAdminStatus(1, err.Error())
+				logger.Warn(fmt.Sprintf(err.Error()))
 			}
 		})
 		heartbeatReporter.Start()