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Ensure 'dnf clean' after 'dnf install' for image storage space saving

Risk Level: medium
Platform: Docker
Spectral Rule ID: DOCKR024

REMEDIATION

Append each dnf install with dnf clean or append the last dnf install with dnf clean all.

FROM fedora:27
RUN set -uex && \
dnf config-manager --add-repo https://download.docker.com/linux/fedora/docker-ce.repo && \
sed -i 's/\$releasever/26/g' /etc/yum.repos.d/docker-ce.repo && \
- dnf install -vy docker-ce
+ dnf install -vy docker-ce && \
+ dnf clean all
HEALTHCHECK CMD curl --fail http://localhost:3000 || exit 1

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Updated 7 months ago