Configure a credential helper to remove this warning. See https://docs.docker.com/engine/reference/commandline/login/#credentials-store
Login Succeeded Building Heroku-based application using gliderlabs/herokuish docker image... Cannot connect to the Docker daemon at tcp://localhost:2375. Is the docker daemon running? Cannot connect to the Docker daemon at tcp://localhost:2375. Is the docker daemon running? Cannot connect to the Docker daemon at tcp://localhost:2375. Is the docker daemon running?
section_end:1601498686:step_script
ERROR: Job failed: command terminated with exit code 1