Fix CI for newer Docker image

Setting DOCKER_HOST won't work now that TLS is enabled by default.
The entrypoint for the Docker image will autodetect that.
2 jobs for master in 7 seconds (queued for 10 seconds)
Status Name Job ID Coverage
  Build
failed build #96061
k8s

00:00:07

 
  Deploy
skipped deploy #96062
k8s
 
Name Stage Failure
failed
build Build

Login Succeeded
$ docker pull "$CI_REGISTRY_IMAGE:latest" || true
Cannot connect to the Docker daemon at tcp://localhost:2375/. Is the docker daemon running?
$ docker pull "$CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG" || true
Cannot connect to the Docker daemon at tcp://localhost:2375/. Is the docker daemon running?
$ docker build --build-arg CI_COMMIT_REF_SLUG --build-arg CI_COMMIT_SHA --build-arg CI_COMMIT_SHORT_SHA --cache-from "$CI_REGISTRY_IMAGE:latest" --cache-from "$CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG" --tag "$CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG" --tag "$CI_REGISTRY_IMAGE:$CI_COMMIT_SHA" --tag "$CI_REGISTRY_IMAGE:$CI_COMMIT_SHORT_SHA" .
Cannot connect to the Docker daemon at tcp://localhost:2375/. Is the docker daemon running?
ERROR: Job failed: command terminated with exit code 1