add resource limits for elastic

compose.yml

@@ -34,6 +34,12 @@ services:
       - discovery.type=single-node
     volumes:
       - elasticsearch-data:/usr/share/elasticsearch/data
+    deploy:
+      resources:
+        limits:
+          memory: 4G
+        reservations:
+          memory: 2G
 
   zammad-init:
     image: zammad/zammad-docker-compose:zammad-5.1.1-11
@@ -55,7 +61,7 @@ services:
     volumes:
       - zammad-data:/opt/zammad
     deploy:
-      restart_policy: 
+      restart_policy:
         condition: on-failure
 
   zammad-memcached: