[feature] Adding curl (or something similar) to the image about octodns-docker

[ross]

It'd probably make sense to use these docker images as the base for a custom image with whatever tooling/scripts you need rather than to have them install things in case people want them, albeit fairly generic ones like curl. A simple Dockerfile like

FROM octodns/octodns:2023.07

RUN set -ex \
  && apt-get -y update \
  && apt-get -y install --no-install-recommends curl \
  && apt-get clean \
  && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*

ENV PATH=/opt/octodns/env/bin:/usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
CMD [ "/bin/sh" ]

Should do the trick.