| 123456789101112131415161718192021222324252627282930313233343536373839 | FROM alpine:3.15LABEL 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 \  mariadb-client \  curl \  bash \  coreutils \  jq \  fcgi \  openssl \  nagios-plugins-mysql \  nagios-plugins-dns \  nagios-plugins-disk \  bind-tools \  redis \  perl \  perl-net-dns \  perl-io-socket-ssl \  perl-io-socket-inet6 \  perl-socket \  perl-socket6 \  perl-mime-lite \  perl-term-readkey \  tini \  tzdata \  whois \  && curl https://raw.githubusercontent.com/mludvig/smtp-cli/v3.10/smtp-cli -o /smtp-cli \  && chmod +x smtp-cliCOPY watchdog.sh /watchdog.shCOPY check_mysql_slavestatus.sh /usr/lib/nagios/plugins/check_mysql_slavestatus.shCMD /watchdog.sh
 |