FEAT(gitlab-ci):Push from Feature Branch

If a Merge Request on a feature Branch is created,
the Image will pushed to gitlab registry

.gitlab-ci.yml

@@ -56,12 +56,24 @@ docker-push:
         then docker build -t $AURA_IMAGE_NAME:unstable .
         else docker build -t $AURA_IMAGE_NAME -t $AURA_IMAGE_NAME:$CI_COMMIT_TAG .
       fi
+
+    # If a merge request on a featrue branch is created 
+    # docker builds are tagged with branch name
+    # hint: The name of feature branches must begin with "feat"
+    - |
+      if [ "$CI_MERGE_REQUEST_SOURCE_BRANCH_NAME" =~ ^feat && "$CI_MERGE_REQUEST_TARGET_BRANCH_NAME" != "$CI_DEFAULT_BRANCH" ]
+        then 
+          docker build -t $AURA_IMAGE_NAME -t $AURA_IMAGE_NAME:$CI_MERGE_REQUEST_SOURCE_BRANCH_NAME
+          docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" $CI_REGISTRY
+        else
+          docker login -u "$DOCKER_ID" -p "$DOCKER_HUB_AUTH"
+
     # TODO: maybe isolate docker build and docker push
     - docker push "$AURA_IMAGE_NAME" --all-tags
   rules:
     - *release-rules
-    # every commit on master/main branch should trigger a push to docker-hub as unstable without a release
-    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH
+    # every commit on master/main or feature branch should trigger a push
+    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH || $CI_MERGE_REQUEST_SOURCE_BRANCH_NAME =~ /^feature/ && $CI_MERGE_REQUEST_TARGET_BRANCH_NAME != $CI_DEFAULT_BRANCH
       exists:
         - Dockerfile