Promethius config

I think that the file ./volumes/prometheus/data/config/config.yml may be incorrect but I leave it to your judgement.

I think that cadvisor needs to be the name of the container, in this case prometheus-cadvisor. I have made the changes below and they all now show as UP in my local instance @ http://iotstack:9090/targets

scrape_configs:

• job_name: "iotstack"
  static_configs:
  • targets:
    • localhost:9090
    • cadvisor:8080
    • nodeexporter:9100
    • prometheus-cadvisor:8080
    • prometheus-nodeexporter:9100

[Paraphraser]

I believe you are correct. I am going to submit some pull requests to deal with this. Thanks for reporting it.