anchor.diff:  # download kubectl
  -FROM golang:alpine as kubectl
  +FROM golang:alpine3.12 as kubectl
   RUN apk add --no-cache curl
   RUN export VERSION=$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt) &&\
       export OS=$(go env GOOS) && \
  
positive.code:     chmod +x /usr/local/bin/kubectl
  
  # build jsonnet-bundler
  FROM golang:alpine as jb
  WORKDIR /tmp
  RUN apk add --no-cache git make bash &&\
      git clone https://github.com/jsonnet-bundler/jsonnet-bundler &&\
  
negative.code:     make static &&\
      mv _output/jb /usr/local/bin/jb
  
  FROM golang:alpine3.12 as helm
  WORKDIR /tmp/helm
  RUN apk add --no-cache jq curl
  RUN export TAG=$(curl --silent "https://api.github.com/repos/helm/helm/releases/latest" | jq -r .tag_name) &&\
  