Update .circleci/config.yml

Author: jviide

.circleci/config.yml

@@ -29,7 +29,7 @@ jobs:
           command: |
             zcat /workdir/workspace/image.tar.gz | docker load
             docker tag ${DOCKER_HUB_IMAGE} ${DOCKER_HUB_IMAGE}:${CIRCLE_TAG}
-            docker login -u ${DOCKER_HUB_USER} -p ${DOCKER_HUB_PASS}
+            echo "${DOCKER_HUB_PASS}" | docker login -u ${DOCKER_HUB_USER} --password-stdin
             docker push ${DOCKER_HUB_IMAGE}:${CIRCLE_TAG}
             docker push ${DOCKER_HUB_IMAGE}