content: 
  ARG ZROK_CLI_TAG=latest
  ARG ZROK_CLI_IMAGE=openziti/zrok
  FROM ${ZROK_CLI_IMAGE}:${ZROK_CLI_TAG}
  
  # set up image as root
  USER root
  
  # install envsubst
  RUN   INSTALL_PKGS="gettext" && \
        microdnf -y update --setopt=install_weak_deps=0 --setopt=tsflags=nodocs && \
        microdnf -y install --setopt=install_weak_deps=0 --setopt=tsflags=nodocs ${INSTALL_PKGS}
  
  ARG ZROK_DNS_ZONE
  ARG ZROK_ADMIN_TOKEN
  ARG ZROK_CTRL_PORT
  ARG ZITI_CTRL_ADVERTISED_PORT
  ARG ZITI_PWD
  
  # render zrok controller config.yml
  COPY --chmod=0755 ./envsubst.bash ./bootstrap-controller.bash /usr/local/bin/
  COPY ./zrok-controller-config.yml.envsubst /tmp/
  RUN mkdir -p /etc/zrok-controller/
  RUN envsubst.bash \
        ZROK_DNS_ZONE=${ZROK_DNS_ZONE} \
        ZROK_ADMIN_TOKEN=${ZROK_ADMIN_TOKEN} \
        ZROK_CTRL_PORT=${ZROK_CTRL_PORT} \
        ZITI_CTRL_ADVERTISED_PORT=${ZITI_CTRL_ADVERTISED_PORT} \
        ZITI_PWD=${ZITI_PWD} \
        < /tmp/zrok-controller-config.yml.envsubst > /etc/zrok-controller/config.yml
  
  # run as ziggy (or ZIGGY_UID if set in compose project)
  USER ziggy
  ENV HOME=/var/lib/zrok-controller
  WORKDIR /var/lib/zrok-controller
  ENTRYPOINT ["bootstrap-controller.bash"]
  