[deployment] Add Fluentd to docker environment

[landerneRPi]

Add Fluentd (for logs management) in EFK (Elasticsearch, Fluent, Kibana) stack.

Create a Dockerfile in fluentd directory to manage the Elasticsearch plugin for Fluentd.

Create in docker/etc/fluentd directory, the fluentd.conf file for managing source and Elasticsearch connection.

Example in docker/docker-compose.yaml:

  fluentd:
    build: ./fluentd
    volumes:
      - ./etc/fluentd:/fluentd/etc
    links:
      - "elasticsearch"
    ports:
      - "24224:24224"
      - "24224:24224/udp"