basic grafana composition

  version: '3'
  services:
    grafana:
      image: grafana/grafana:4.1.2
      ports:
        - "8085:3000"
      volumes:
        - /data/grafana:/var/lib/grafana
      logging:
        - driver: gelf
        - options:
          gelf-address: udp://elk_logstash:12201
          gelf-tag: "grafana"
      environment:
          - GF_SERVER_ROOT_URL=https://graf.test.net