Update logstash.conf

logstash/docker/pipeline/logstash.conf

@@ -9,11 +9,11 @@ input {
 output {
 	if [@metadata][source] == "winlogbeat" {
 		elasticsearch {
-			hosts => ["localhost:9200"]
+			hosts => "elasticsearch:9200"
 			sniffing => true
 			manage_template => false 
 			index => "%{[@metadata][beat]}-%{+YYYY.MM.dd}"
 			document_type => "%{[@metadata][type]}"
 		}
 	}
-}
+}