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Dockerfile
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FROM golang:1.17.6-alpine3.15 AS builder
ENV PACKAGES="\
kubectl \
helm \
"
RUN apk add \
--no-cache \
--repository http://dl-3.alpinelinux.org/alpine/edge/testing/ \
--allow-untrusted \
$PACKAGES
RUN go install github.com/controlplaneio/kubesec/v2@latest \
&& mkdir /user \
&& echo 'nobody:x:65534:65534:nobody:/:' > /user/passwd \
&& echo 'nobody:x:65534:' > /user/group
FROM alpine:3.15
WORKDIR /src
COPY --from=builder /user/group /user/passwd /etc/
COPY --chown=nobody --from=builder /usr/bin/kubectl /usr/bin/kubectl
COPY --chown=nobody --from=builder /usr/bin/helm /usr/bin/helm
COPY --chown=nobody --from=builder /go/bin/kubesec /usr/bin/kubesec
COPY --chown=nobody --from=k8s.gcr.io/kustomize/kustomize:v3.8.7 /app/kustomize /usr/bin/kustomize
COPY --chown=nobody --from=garethr/kubeval:0.15.0 /kubeval /usr/bin/kubeval
COPY --chown=nobody --from=zegl/kube-score:v1.13.0 /kube-score /usr/bin/kube-score
USER nobody:nobody
CMD ["/bin/sh"]