fix(logger): gracefully handle a nil return from etcd watch

Author: kalbasit

logger/main.go

@@ -66,8 +66,10 @@ func main() {
 
 	for {
 		select {
-		case er := <-drainRespChan:
-			drainChan <- er.Node.Value
+		case dr := <-drainRespChan:
+			if dr != nil && dr.Node != nil {
+				drainChan <- dr.Node.Value
+			}
 		case <-signalChan:
 			close(exitChan)
 			stopChan <- true