Ubuntu 16.04 - > ERROR: Couldn't connect to Docker daemon - you might need to run `docker-machine start default`

Question

I am getting error on ubuntu 16.04

\"ERROR: Couldn\'t connect to Docker daemon - you might need to run docker- machine start default. \"

Answer 1

My issue was that I was missing $ sign in front of variable in the image name

image: imagename:{TAG:-develop-latest}