consul: Setup and experiment to see if it's able to work

[adamdecaf]

I largely am looking for service discovery right now. So that apps don't need to be hand configured to each other inside docker-compose.

https://www.consul.io/intro/ https://github.com/hashicorp/consul https://github.com/hashicorp/consul-template https://hub.docker.com/r/progrium/consul/ https://github.com/hashicorp/consul/blob/master/terraform/aws/consul.tf https://github.com/hashicorp/best-practices/blob/master/terraform/modules/aws/data/consul/consul.tf