FROM alpine:3.12.0

ARG KUBECTL_VERSION=1.18.9

COPY mask2cdr /usr/sbin/

RUN apk add --update --no-cache curl ca-certificates jq && \
    curl -LO https://storage.googleapis.com/kubernetes-release/release/v${KUBECTL_VERSION}/bin/linux/amd64/kubectl && \
    mv kubectl /usr/bin/kubectl && \
    chmod +x /usr/bin/kubectl