Enable Docker for all stages correctly

We need to do this because docker and docker compose don't connect properly to the Docker-in-docker service without specifically setting up the port to connect to.

.gitlab-ci.yml

@@ -8,6 +8,9 @@ stages:
 
 variables:
   CONTAINER_RELEASE_IMAGE: $CI_REGISTRY_IMAGE:latest
+  DOCKER_HOST: tcp://docker:2375
+  DOCKER_TLS_CERTDIR: ""
+
 
 build:
   stage: build