CI: use branch name instead of commit to tag images, deactivate kaniko cache

.gitlab-ci.yml

@@ -1,6 +1,6 @@
 variables:
   GIT_SUBMODULE_STRATEGY: normal
-  DOCKER_TAG: ${CI_COMMIT_SHORT_SHA}
+  DOCKER_TAG: ${CI_COMMIT_BRANCH}
   DOCKER_IMAGE: ${CI_REGISTRY_IMAGE}
 
 cache:
@@ -42,8 +42,5 @@ deploy:
       --dockerfile ${CI_PROJECT_DIR}/Dockerfile
       --destination ${DOCKER_IMAGE}:${DOCKER_TAG}
       --snapshotMode=redo
-      --cache=true
-      --cache-ttl=12h
-  only:
-   refs:
-     - master
+  dependencies:
+    - build