first try

Dockerfile

@@ -1,27 +1,80 @@
-# Example Dockerfile for amd64
-ARG BASE_IMAGE=alpine:latest
+# syntax=docker/dockerfile:1
+ARG BUILD_BASE_IMAGE
+FROM ${BUILD_BASE_IMAGE}
 
-FROM ${BASE_IMAGE}
+ARG BUILD_APP_VERSION
+ARG BUILD_S6_ARCH_amd64
+ARG BUILD_S6_OVERLAY_VERSION
+ARG BUILD_DATE
+ARG MODS_VERSION="v3"
+ARG PKG_INST_VERSION="v1"
+ARG LSIOWN_VERSION="v1"
+ARG WITHCONTENV_VERSION="v1"
+ARG BUILD_APP_USER
+ARG BUILD_APP_UID
+ARG BUILD_APP_GID
+ARG BUILD_MAINTAINER
 
-ARG MAINTAINER
-ARG TZ
-ARG APP_NAME
-ARG APP_USER
+LABEL build_version="${BUILD_MAINTAINER} version: ${BUILD_APP_VERSION} Build-date:- ${BUILD_DATE}"
+LABEL maintainer="${BUILD_MAINTAINER}"
 
-LABEL maintainer="${MAINTAINER}"
-LABEL org.opencontainers.image.title="${APP_NAME}"
+# RHEL nutzt microdnf. Wir installieren xz (für tar) und shadow-utils (für useradd)
+RUN microdnf update -y && \
+    microdnf install -y --nodocs \
+    xz \
+    tar \
+    shadow-utils \
+    tzdata && \
+    microdnf clean all
 
-ENV TZ=${TZ}
-ENV USER=${APP_USER}
+# add s6 overlay
+ADD https://github.com/just-containers/s6-overlay/releases/download/v${BUILD_S6_OVERLAY_VERSION}/s6-overlay-noarch.tar.xz /tmp
+RUN tar -C / -Jxpf /tmp/s6-overlay-noarch.tar.xz
+ADD https://github.com/just-containers/s6-overlay/releases/download/v${BUILD_S6_OVERLAY_VERSION}/s6-overlay-${BUILD_S6_ARCH_amd64}.tar.xz /tmp
+RUN tar -C / -Jxpf /tmp/s6-overlay-${BUILD_S6_ARCH_amd64}.tar.xz
 
-RUN apk add --no-cache tzdata ca-certificates
+# add s6 optional symlinks
+ADD https://github.com/just-containers/s6-overlay/releases/download/v${BUILD_S6_OVERLAY_VERSION}/s6-overlay-symlinks-noarch.tar.xz /tmp
+RUN tar -C / -Jxpf /tmp/s6-overlay-symlinks-noarch.tar.xz && unlink /usr/bin/with-contenv
+ADD https://github.com/just-containers/s6-overlay/releases/download/v${BUILD_S6_OVERLAY_VERSION}/s6-overlay-symlinks-arch.tar.xz /tmp
+RUN tar -C / -Jxpf /tmp/s6-overlay-symlinks-arch.tar.xz
 
-WORKDIR /app
-COPY ./config /app/config
-COPY ./data /app/data
+# LSIO Mods Integration
+ADD --chmod=744 "https://raw.githubusercontent.com/linuxserver/docker-mods/mod-scripts/docker-mods.${MODS_VERSION}" "/docker-mods"
+ADD --chmod=744 "https://raw.githubusercontent.com/linuxserver/docker-mods/mod-scripts/package-install.${PKG_INST_VERSION}" "/etc/s6-overlay/s6-rc.d/init-mods-package-install/run"
+ADD --chmod=744 "https://raw.githubusercontent.com/linuxserver/docker-mods/mod-scripts/lsiown.${LSIOWN_VERSION}" "/usr/bin/lsiown"
+ADD --chmod=755 "https://raw.githubusercontent.com/linuxserver/docker-mods/mod-scripts/with-contenv.${WITHCONTENV_VERSION}" "/usr/bin/with-contenv"
 
-RUN adduser -D ${APP_USER} && chown -R ${APP_USER}:${APP_USER} /app
+# set environment variables
+ENV HOME="/root" \
+    LANGUAGE="de_DE.UTF-8" \
+    LANG="de_DE.UTF-8" \
+    TERM="xterm" \
+    S6_CMD_WAIT_FOR_SERVICES_MAXTIME="0" \
+    S6_VERBOSITY=1 \
+    S6_STAGE2_HOOK=/docker-mods \
+    VIRTUAL_ENV=/lsiopy \
+    PATH="/lsiopy/bin:$PATH"
 
-USER ${APP_USER}
+RUN echo "**** install packages and locales ****" && \
+    microdnf install -y --nodocs \
+    glibc-langpack-de \
+    curl \
+    jq \
+    nmap-ncat \
+    cronie && \
+    echo "**** create user and folders ****" && \
+    # In RHEL prüfen wir, ob die Gruppe existiert, bevor wir sie anlegen
+    groupadd -g ${BUILD_APP_GID} ${BUILD_APP_USER} || true && \
+    useradd -u ${BUILD_APP_UID} -g ${BUILD_APP_GID} -d /config -s /bin/false ${BUILD_APP_USER} && \
+    mkdir -p /app /config /defaults /lsiopy && \
+    echo "**** cleanup ****" && \
+    microdnf clean all && \
+    rm -rf /tmp/* /var/tmp/*
 
-CMD ["sh"]
+# 7. Lokale Skripte kopieren und Ausführungsrechte für S6 reparieren
+ADD https://git.pi-farm.de/pi-farm/s6-overlay/archive/stable.tar.gz /tmp 
+RUN tar -C / -Jxpf /tmp/stable.tar.gz && rm -rf /tmp/stable.tar.gz
+RUN find /etc/s6-overlay/s6-rc.d/ -type f \( -name "run" -o -name "up" \) -exec chmod +x {} +
+
+ENTRYPOINT ["/init"]