content: FROM docker.io/library/ubuntu:20.04
  
  # metadata
  ARG VCS_REF
  ARG BUILD_DATE
  
  LABEL io.parity.image.authors="devops-team@parity.io" \
  	io.parity.image.vendor="Parity Technologies" \
  	io.parity.image.title="parity/subkey" \
  	io.parity.image.description="Subkey: key generating utility for Substrate." \
  	io.parity.image.source="https://github.com/paritytech/substrate/blob/${VCS_REF}/.maintain/docker/subkey.Dockerfile" \
  	io.parity.image.revision="${VCS_REF}" \
  	io.parity.image.created="${BUILD_DATE}" \
  	io.parity.image.documentation="https://github.com/paritytech/substrate/tree/${VCS_REF}/subkey"
  
  # show backtraces
  ENV RUST_BACKTRACE 1
  
  # add user
  RUN useradd -m -u 1000 -U -s /bin/sh -d /subkey subkey
  
  # add subkey binary to docker image
  COPY ./subkey /usr/local/bin
  
  USER subkey
  
  # check if executable works in this container
  RUN /usr/local/bin/subkey --version
  
  ENTRYPOINT ["/usr/local/bin/subkey"]
  