Dockerfile

FROM alpine:3.10

WORKDIR /

RUN apk update -f \
  && apk --no-cache add -f \
  openssl \
  openssh-client \
  coreutils \
  bind-tools \
  curl \
  socat \
  tzdata \
  jq \
  oath-toolkit-oathtool \
  tar \
  py3-pip \
  && rm -rf /var/cache/apk/*

RUN pip3 install awscli --upgrade

ENV LE_CONFIG_HOME /acme.sh

ENV AUTO_UPGRADE 1

#Install
ADD ./ /install_acme.sh/
RUN cd /install_acme.sh && ([ -f /install_acme.sh/acme.sh ] && /install_acme.sh/acme.sh --install || curl https://get.acme.sh | sh) && rm -rf /install_acme.sh/

RUN ln -s  /root/.acme.sh/acme.sh  /usr/local/bin/acme.sh && crontab -l | grep acme.sh | sed 's#> /dev/null##' | crontab -

# This loop creates executable aliases that link to the acme.sh script, which is what allows passing commands into the container as if they were cli options for the script
# ex: --issue is the command parameter passed to the script which tells it to issue a certificate. Docker parses that --issue on the cli as a command, which is created in this loop.
RUN for verb in help \
  version \
  install \
  uninstall \
  upgrade \
  issue \
  signcsr \
  deploy \
  install-cert \
  renew \
  renew-all \
  revoke \
  remove \
  list \
  showcsr \
  install-cronjob \
  uninstall-cronjob \
  cron \
  toPkcs \
  toPkcs8 \
  update-account \
  register-account \
  create-account-key \
  create-domain-key \
  createCSR \
  deactivate \
  deactivate-account \
  set-notify \
  ; do \
    printf -- "%b" "#!/usr/bin/env sh\n/root/.acme.sh/acme.sh --${verb} --config-home /acme.sh \"\$@\"" >/usr/local/bin/--${verb} && chmod +x /usr/local/bin/--${verb} \
  ; done

COPY ./entry.sh .
RUN chmod +x /entry.sh

COPY ./smtp-relay-automation.sh .
RUN chmod +x /smtp-relay-automation.sh

VOLUME /acme.sh

ENTRYPOINT ["/smtp-relay-automation.sh"]
CMD ["--help"]