Resolve "Integrate ELK stack with Fluentd"

Closes #9 (closed)

docker-compose.efk.dev.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=-Xms256m -Xmx256m"
       - "discovery.type=single-node"
     deploy:
-      replicas: 1
-      placement:
-        constraints: [node.role == manager]
       resources:
         limits:
           memory: 500M
-    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: