chore: CI debug

.gitlab-ci.yml

@@ -2,7 +2,6 @@ services:
   - name: docker:19.03.6-dind
     command: ["--mtu=1458"]
 
-    
 variables:
   DOCKER_DRIVER: overlay2
   DOCKER_TLS_CERTDIR: ""
@@ -17,15 +16,18 @@ build-testing-image:
   tags:
     - privileged
   before_script:
-    - echo " (1) ----------------------------- "
     - docker info
-    - echo " (2) ----------------------------- "
+    - echo $CI_REGISTRY_PASSWORD | docker login -u $CI_REGISTRY_USER --password-stdin $CI_REGISTRY
   script:
-    - echo " (3) ----------------------------- "
-    - docker build --tag $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA --tag $CI_REGISTRY_IMAGE:latest .
-    - echo " (4) ----------------------------- "
+    - docker pull $CI_REGISTRY_IMAGE:latest || true
+    - docker build --cache-from $CI_REGISTRY_IMAGE:latest --tag $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA --tag $CI_REGISTRY_IMAGE:latest .
     - docker push $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA
     - docker push $CI_REGISTRY_IMAGE:latest
+  only:
+    changes:
+      - "DESCRIPTION"
+      - "Dockerfile"
+  when: always
 
 run-drake:
   stage: fit