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FROM debian:buster-slim
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ARG DEBIAN_FRONTEND=noninteractive
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RUN apt-get update \
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&& apt-get install -y --no-install-recommends \
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certbot \
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python3-certbot-dns-rfc2136 \
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cron \
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openssh-client \
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&& rm -rf /var/lib/apt/lists/*
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VOLUME ["/etc/letsencrypt"]
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CMD ["cron", "-f"]
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