dockerhub login

Login into Dockerhub, to have bigger limit-rate when pulling images.

.gitlab-ci.yml

@@ -47,6 +47,7 @@ test-job:
   before_script:
     - docker compose -f docker-compose.testing.yml up -d
   script:
+    - echo ${DOCKERHUB_TOKEN} | docker login -u ${DOCKERHUB_USER} --password-stdin
     - docker build --build-arg http_proxy=$HTTP_PROXY --build-arg https_proxy=$HTTPS_PROXY -t robotframework ./tests/docker/
     - cmd='robot --outputdir /project/reports -v BASE_URL:http://netbox-backup-agent:1880 -v MOCKSERVER_BASE_URL:http://mock-docker-agent:1080 /project/tests/'
     - docker run --rm -v $CI_PROJECT_DIR:/project --network netbox-backup-agent_netbox-backup-agent robotframework:latest bash -c "$cmd"