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chore: Minor changes to Dockerfile (#7428)

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- `-qq` implies `-y` for `apt-get`. Also there never was `-yy`, only `-y`.
- `--no-install-recommends` added at the request of review feedback.
- Add a reference comment for better context of why `WORKDIR` is explicitly set to the default, as this was a fix for an implicit change when the base image was adjusted (_originally a breaking change for users of the image at the time_).

Signed-off-by: Brennan Kinney <5098581+polarathene@users.noreply.github.com>
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Brennan Kinney 2025-08-05 11:54:18 +12:00 committed by GitHub
parent 1025a199e9
commit a5388133de
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1 changed files with 4 additions and 2 deletions
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@ -8,8 +8,8 @@ RUN export DEBCONF_NONINTERACTIVE_SEEN=true \
DEBIAN_PRIORITY=critical \ DEBIAN_PRIORITY=critical \
TERM=linux ; \ TERM=linux ; \
apt-get -qq update ; \ apt-get -qq update ; \
apt-get -yyqq upgrade ; \ apt-get -qq upgrade ; \
apt-get -yyqq install ca-certificates libcap2-bin; \ apt-get -qq --no-install-recommends install ca-certificates libcap2-bin; \
apt-get clean apt-get clean
COPY coredns /coredns COPY coredns /coredns
RUN setcap cap_net_bind_service=+ep /coredns RUN setcap cap_net_bind_service=+ep /coredns
@ -18,6 +18,8 @@ FROM --platform=$TARGETPLATFORM ${BASE}
COPY --from=build /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ COPY --from=build /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
COPY --from=build /coredns /coredns COPY --from=build /coredns /coredns
USER nonroot:nonroot USER nonroot:nonroot
# Reset the working directory inherited from the base image back to the expected default:
# https://github.com/coredns/coredns/issues/7009#issuecomment-3124851608
WORKDIR / WORKDIR /
EXPOSE 53 53/udp EXPOSE 53 53/udp
ENTRYPOINT ["/coredns"] ENTRYPOINT ["/coredns"]