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Last week Docker released a new version, 19.03, which brings a few exciting features with it. One of the features affects GitLab CI/CD when using the Docker in Docker workflow. As of version 19.03, docker:dind will automatically generate TLS certificates and require using them for communication. This is from Docker's official documentation: Starting in 18.09+, the dind variants of this image will automatically generate TLS certificates in the directory specified by the DOCKER_TLS_CERTDIR enviro...