Merge branch 'fix-typo' into 'master'

fix: typo corrected in envvar in ci script

See merge request !8

.gitlab-ci.yml

@@ -25,7 +25,7 @@ build and publish the image:
 
     # Build the new version, assign new tag and `latest` tag
     - docker build --cache-from $CI_REGISTRY_IMAGE:latest .
-    - docker build -t $CI_REGISTRY_IMAGE:$(CI_COMMIT_TAG) .
+    - docker build -t $CI_REGISTRY_IMAGE:$CI_COMMIT_TAG .
 
     # Push the newly built version to the registry
     - docker push $CI_REGISTRY_IMAGE