Image build is optimized.

.gitlab-ci.yml

@@ -39,7 +39,7 @@ build:
       command: ["--tls=false", "--storage-driver=overlay2", "--mtu=1500", "--data-root=/mnt/volume"]
   script:
     - docker buildx create --use
-    - docker login
+    - echo "$DOCKER_PASSWORD" | docker login -u "$DOCKER_USERNAME" --password-stdin
     #    - docker build --cache-from=flask-backend-full --no-cache --progress=plain -t flask-backend-full -f flask_ml_api/Dockerfile .
     - docker build --cache-from=flask-backend-full --no-cache --progress=plain -t 22baar1mst/asyst-nlp-grader:latest -f flask_ml_api/Dockerfile .
     - echo $DOCKER_REPO