Demonstating difference between Bind and Volume mounts
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Data on the host will be hidden with the Bind Mount
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Data using a COPY or RUN echo within the container can't be seen due to being in a staged image But running an ENTRYPOINT script, or representing an application start, such data would be seen on host by both mount types
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But, using Volume mounts, the data can be lost if a "docker volume prune" is carried out after the container is deleted -- worrying!