CI: use Docker-in-Docker instead of KVM

This is faster and supported by more of our Runners than the KVM
executor.

.gitlab-ci-files/common-prepare.yml

@@ -21,14 +21,19 @@
   - chmod 644 ~/.ssh/known_hosts
 
 .standard_job:
-  tags: [kvm]
+  tags:
+    - docker
   before_script:
     - *ensure_docker
 
 .make_in_docker:
   extends: .standard_job
+  image: docker:stable
+  services:
+    - docker:dind
   script:
     - docker login -u ${DOCKER_REGISTRY_USER} -p ${DOCKER_REGISTRY_PASS} ${DOCKER_REGISTRY_HOST}
+    - apk add -U make git
     - cd scripts/ci/${CI_DISTRO_TARGET}
     - make ${MAKE_TARGET}
 

scripts/ci/debian11/Makefile

@@ -30,8 +30,8 @@ deps:
 		      --tag=$(IMAGE_NAME)-deps:$(SEQUOIA_VERSION)-$(YML2_VERSION) \
 		      --tag=$(IMAGE_NAME)-deps:latest \
 		      -f scripts/ci/${CURRENT_DISTRO}/deps.$(DOCKERFILE) .
-	docker push --quiet $(IMAGE_NAME)-deps:$(SEQUOIA_VERSION)-$(YML2_VERSION)
-	docker push --quiet $(IMAGE_NAME)-deps:latest
+	docker push $(IMAGE_NAME)-deps:$(SEQUOIA_VERSION)-$(YML2_VERSION)
+	docker push $(IMAGE_NAME)-deps:latest
 
 build:
 	cd ../../../ && /bin/sh ./scripts/ci/common/build_pEpEngine.sh
@@ -48,5 +48,5 @@ build-docker:
 		      --tag=$(IMAGE_NAME):$(PEPENGINE_VERSION) \
 		      --tag=$(IMAGE_NAME):latest \
 		      -f scripts/ci/common/build.pEpEngine.Dockerfile .
-	docker push --quiet $(IMAGE_NAME):$(PEPENGINE_VERSION)
-	docker push --quiet $(IMAGE_NAME):latest
+	docker push $(IMAGE_NAME):$(PEPENGINE_VERSION)
+	docker push $(IMAGE_NAME):latest