Merge branch 'fix-pipeline-tag' into 'master'

Change to new CI tag and automatic dind service

See merge request !22

.gitlab-ci.yml

@@ -15,14 +15,10 @@ docker-build:
   stage: image
   image: docker:latest
   tags:
-    - privileged
+    - integration_tests
   only:
     refs:
       - master
-  services:
-    - docker:dind
-  variables:
-    DOCKER_TLS_CERTDIR: "/certs"
   before_script:
     - docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" $CI_REGISTRY
   script: