| 123456789101112131415161718192021222324252627282930313233343536 | FROM alpine:3.9LABEL maintainer "André Peters <andre.peters@servercow.de>"# InstallationRUN apk add --update \  && apk add --no-cache nagios-plugins-smtp \  nagios-plugins-tcp \  nagios-plugins-http \  nagios-plugins-ping \  curl \  bash \  coreutils \  jq \  fcgi \  nagios-plugins-mysql \  nagios-plugins-dns \  nagios-plugins-disk \  bind-tools \  redis \  perl \  perl-io-socket-ssl \  perl-io-socket-inet6 \  perl-socket \  perl-socket6 \  perl-mime-lite \  perl-term-readkey \  tini \  tzdata \  && curl https://raw.githubusercontent.com/mludvig/smtp-cli/v3.9/smtp-cli -o /smtp-cli \  && chmod +x smtp-cliCOPY watchdog.sh /watchdog.shENTRYPOINT ["/sbin/tini", "-g", "--"]# Less verboseCMD /watchdog.sh 2> /dev/null
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