CI: Debug docker auth

.gitlab-ci.yml

@@ -38,8 +38,7 @@ build:
   script:
     - set -x
     - echo 'building!'
-    - ls -lah ~/.docker || true
-    - ls -lah ~ || true
+    - echo $CI_REGISTRY_PASSWORD | docker login -u $CI_REGISTRY_USER --password-stdin $CI_REGISTRY
     - docker info
     - docker version # verify docker cli is there. Also prints server info
     - echo building ${SERVER_IMAGE_TAG}