Disable TLS for dind

.gitlab-ci.yml

@@ -15,6 +15,8 @@ variables:
   # When using dind, it's wise to use the overlayfs driver for
   # improved performance.
   DOCKER_DRIVER: overlay2
+  # https://about.gitlab.com/2019/07/31/docker-in-docker-with-docker-19-dot-03/
+  DOCKER_TLS_CERTDIR: ""
 
 services:
   - name: docker:dind