Chore: Enable golangci-lint

Add a GitHub actions workflow to run golangci-lint.

Signed-off-by: SuperQ <superq@gmail.com>

ntp.go

@@ -20,7 +20,6 @@ const (
 )
 
 var (
-	timeSynced            = false
 	timeSyncRetryInterval = 0 * time.Second
 	defaultNTPServers     = []string{
 		"time.cloudflare.com",
@@ -58,7 +57,6 @@ func TimeSyncLoop() {
 			continue
 		}
 		logger.Infof("Time sync successful, now is: %v, time taken: %v", time.Now(), time.Since(start))
-		timeSynced = true
 		time.Sleep(timeSyncInterval) // after the first sync is done
 	}
 }