2019-1-22 Docker "Can't find a suitable configuration file" Solution
install docker as root fix my issue
docker-compose up show this.
but ls command indeed show in current directory this file exist
Switch to root and install docker again.
I am using Google Cloud with Ubuntu 18.04
I just use the web ssh UI log into machine and install docker.
turn out it better install docker as root to avoid these problem
also. if you are using port like 8090 or some random port.
don't forget turn on that port in Google Cloud firewall rules.