Training 14 and docker

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https://github.com/inveniosoftware/training/tree/v3.4/14-deployment-monitoring

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On the step 1 after running docker-compose -f docker-compose.full.yml up the output goes like:
Building worker Step 1/6 : ARG DEPENDENCIES_VERSION=latest Step 2/6 : FROM my-site-base:${DEPENDENCIES_VERSION} ERROR: Service 'worker' failed to build : pull access denied for my-site-base, repository does not exist or may require 'docker login': denied: requested access to the resource is denied