Add possible production ES config

It's still very similar to dev, common configs could be extracted

docker-compose.efk.ops.yml

+version: "3.6"
+services:
+  fluentd:
+    image: registry.gitlab.eox.at/esa/prism/vs/fluentd:0.0.0-test
+    configs:
+      - source: fluentd-conf
+        target: /fluentd/etc/fluent.conf
+    ports:
+      - "24224:24224"
+      - "24224:24224/udp"
+    networks:
+      - logging
+    deploy:
+      # fluentd doesn't need to be deployed globally, but it might be a good
+      # default to have it everywhere
+      mode: global
+  elasticsearch:
+    image: elasticsearch:7.9.0
+    ports:
+      - "9200:9200"
+    networks:
+      - logging
+    environment:
+      - bootstrap.memory_lock=true
+      - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
+      - "discovery.type=single-node"
+    ulimits:
+      memlock:
+        soft: -1
+        hard: -1
+      nofile:
+        soft: 65536
+        hard: 65536
+    deploy:
+      replicas: 1
+      placement:
+        constraints: [node.role == manager]
+      resources:
+        limits:
+          memory: 1000M
+    volumes:
+      - es-data:/usr/share/elasticsearch/data
+  kibana:
+    image: kibana:7.9.0
+    ports:
+      - "5601:5601"
+    networks:
+      - logging
+    deploy:
+      mode: replicated
+      replicas: 1
+      placement:
+        constraints: [node.role == manager]
+configs:
+  fluentd-conf:
+    file: ./fluentd/conf/fluent.conf
+volumes:
+  es-data:
+networks:
+  logging: