gitlab-ci: add latest tag

.gitlab-ci.yml

@@ -19,14 +19,15 @@ build azodyn:
   stage: build
   
   variables:
-    IMAGE_TAG: $CI_REGISTRY/$CI_PROJECT_NAMESPACE/azodyn_pea:$CI_COMMIT_SHA
+    CONTAINER_IMAGE: $CI_REGISTRY/$CI_PROJECT_NAMESPACE/azodyn_pea
   
   script:
     - docker info
     - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
-    - docker pull $IMAGE_TAG || true
-    - docker build --cache-from $IMAGE_TAG -t $IMAGE_TAG -f siwaa_recipe/container/Dockerfile .
-    - docker push $IMAGE_TAG
+    - docker pull $CONTAINER_IMAGE:latest || true
+    - docker build --cache-from $CONTAINER_IMAGE:latest --tag $CONTAINER_IMAGE:latest --tag $CONTAINER_IMAGE:$CI_COMMIT_SHA -f siwaa_recipe/container/Dockerfile .
+    - docker push $CONTAINER_IMAGE:$CI_COMMIT_SHA
+    - docker push $CONTAINER_IMAGE:latest
     
   when: manual