inital version

Dockerfile

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+FROM debian:bookworm-slim
+LABEL maintainer="docker@ao-it.net"
+
+## prepare requirements
+RUN ["bash", "-exo", "pipefail", "-c", "\
+    export DEBIAN_FRONTEND=noninteractive ; \
+    apt update ; \ 
+    apt install -y wget gnupg ; \
+    wget -O - https://packages.icinga.com/icinga.key | \
+    gpg --dearmor -o /usr/share/keyrings/icinga-archive-keyring.gpg ; \
+    source /etc/os-release ; \
+    echo \"deb [signed-by=/usr/share/keyrings/icinga-archive-keyring.gpg] https://packages.icinga.com/debian icinga-${VERSION_CODENAME} main\" > /etc/apt/sources.list.d/${VERSION_CODENAME}-icinga.list ; \
+    echo \"deb-src [signed-by=/usr/share/keyrings/icinga-archive-keyring.gpg] https://packages.icinga.com/debian icinga-${VERSION_CODENAME} main\" >> /etc/apt/sources.list.d/${VERSION_CODENAME}-icinga.list ; \
+    apt clean all ; \
+    rm -vrf /var/lib/apt/lists/* "]
+
+## install icinga2 
+RUN ["bash", "-exo", "pipefail", "-c", "\
+    export DEBIAN_FRONTEND=noninteractive ; \
+    apt update ; \
+    apt install -y icinga2 monitoring-plugins ; \
+    mkdir -p /run/icinga2 ; \
+    chown nagios: /run/icinga2 ; \
+    apt clean all ; \
+    rm -vrf /var/lib/apt/lists/* "]
+
+## create persistend data store
+RUN ["bash", "-exo", "pipefail", "-c", "\
+    mkdir -p /data ; \
+    mkdir -p /data-init/etc/ ; \
+    mkdir -p /data-init/var/ ; \
+    mkdir -p /data-init/plugins ; \
+    mv /etc/icinga2 /data-init/etc/ ; \
+    mv /var/lib/icinga2 /data-init/var/ ; \
+    mv /usr/lib/nagios/plugins /data-init/ ; \
+    ln -vs /data/etc/icinga2 /etc/icinga2 ; \
+    ln -vs /data/var/icinga2 /var/lib/icinga2 ; \
+    ln -vs /data/plugins /usr/lib/nagios/plugins ; \
+"]
+
+EXPOSE 5665
+
+COPY init.sh /root/init.sh
+
+VOLUME ["/data"]
+WORKDIR /
+USER root
+CMD ["bash", "/root/init.sh"]