2019-1-22 Docker "Can't find a suitable configuration file" Solution

Error

docker-compose up show this.

but ls command indeed show in current directory this file exist

Solution

Switch to root and install docker again.

Detail

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.