Running with gitlab-runner 12.6.0 (ac8e767a) on cloud-vm-40-236 1RNvpDKP Using Docker executor with image gitlab.doc.ic.ac.uk:4567/ljt18/simplewebapp:attempt-at-sharedrunnerdocker ... WARNING: Container based cache volumes creation is disabled. Will not create volume for "/cache" Authenticating with credentials from job payload (GitLab Registry) Pulling docker image gitlab.doc.ic.ac.uk:4567/ljt18/simplewebapp:attempt-at-sharedrunnerdocker ... ERROR: Job failed: Error response from daemon: manifest for gitlab.doc.ic.ac.uk:4567/ljt18/simplewebapp:attempt-at-sharedrunnerdocker not found: manifest unknown: manifest unknown (executor_docker.go:188:0s)