Dockerfile


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FROM debian:stable-slim

RUN sed -i.bak s@stable/update@stable-security/update@g /etc/apt/sources.list
RUN apt-get update && apt-get -uy upgrade
RUN apt-get -y install ca-certificates && update-ca-certificates

FROM scratch

COPY --from=0 /etc/ssl/certs /etc/ssl/certs
ADD coredns /coredns

EXPOSE 53 53/udp
ENTRYPOINT ["/coredns"]