I have a following Dockerfile FROM python:3.6 WORKDIR /app ADD main.py /app ENTRYPOINT [ "python3", "main.py" ] I have a prerequisite test that runs before deployment that verifies connection, input files, etc So I added testing script to Docker image like FROM python:3.6 WORKDIR /app ADD main.py /app ADD test.py /app ENTRYPOINT [ "python3", "main.py" ..

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