rebase to alpine base-image

Dockerfile

@@ -1,35 +1,53 @@
-ARG BUILD_BASE_IMAGE
-FROM ${BUILD_BASE_IMAGE}
+# syntax=docker/dockerfile:1
+ARG BUILD_BASE_IMAGE=alpine:latest #Fallback alpine:latest
+FROM ${BUILD_BASE_IMAGE} AS rootfs-stage
 
-ARG MAINTAINER
-ARG TZ
-ARG APP_NAME
-ARG APP_USER
-ARG BUILD_S6_OVERLAY_VERSION
-ARG BUILD_S6_ARCH_amd64
+# environment
+ENV REL=${BUILD_DEBIAN_REL}
+ENV ARCH=${BUILD_DEBIAN_ARCH}
 
-LABEL maintainer="${MAINTAINER}"
-LABEL org.opencontainers.image.title="${APP_NAME}"
+# install packages
+RUN \
+  apk add --no-cache \
+    bash \
+    curl \
+    tzdata \
+    xz
 
-ENV TZ=${TZ}
-ENV USER=${APP_USER}
+# grab base tarball
+RUN \
+  mkdir /root-out && \
+  curl -o \
+    /rootfs.tar.gz -L \
+    https://github.com/debuerreotype/docker-debian-artifacts/raw/refs/heads/dist-${ARCH}/${REL}/slim/oci/blobs/rootfs.tar.gz && \
+  tar xf \
+    /rootfs.tar.gz -C \
+    /root-out && \
+  rm -rf \
+    /root-out/var/log/*
 
-RUN apt-get update && \
-    apt-get install -y --no-install-recommends xz-utils \
-    tzdata
+# set version for s6 overlay
+ARG S6_OVERLAY_VERSION=${BUILD_S6_OVERLAY_VERSION}
+ARG S6_OVERLAY_ARCH=${BUILD_S6_ARCH_amd64}
 
 # add s6 overlay
-ADD https://github.com/just-containers/s6-overlay/releases/download/v${BUILD_S6_OVERLAY_VERSION}/s6-overlay-noarch.tar.xz /tmp
+ADD https://github.com/just-containers/s6-overlay/releases/download/v${S6_OVERLAY_VERSION}/s6-overlay-noarch.tar.xz /tmp
 RUN tar -C /root-out -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 /root-out -Jxpf /tmp/s6-overlay-${BUILD_S6_ARCH_amd64}.tar.xz
+ADD https://github.com/just-containers/s6-overlay/releases/download/v${S6_OVERLAY_VERSION}/s6-overlay-${S6_OVERLAY_ARCH}.tar.xz /tmp
+RUN tar -C /root-out -Jxpf /tmp/s6-overlay-${S6_OVERLAY_ARCH}.tar.xz
 
 # add s6 optional symlinks
-ADD https://github.com/just-containers/s6-overlay/releases/download/v${BUILD_S6_OVERLAY_VERSION}/s6-overlay-symlinks-noarch.tar.xz /tmp
+ADD https://github.com/just-containers/s6-overlay/releases/download/v${S6_OVERLAY_VERSION}/s6-overlay-symlinks-noarch.tar.xz /tmp
 RUN tar -C /root-out -Jxpf /tmp/s6-overlay-symlinks-noarch.tar.xz && unlink /root-out/usr/bin/with-contenv
-ADD https://github.com/just-containers/s6-overlay/releases/download/v${BUILD_S6_OVERLAY_VERSION}/s6-overlay-symlinks-arch.tar.xz /tmp
+ADD https://github.com/just-containers/s6-overlay/releases/download/v${S6_OVERLAY_VERSION}/s6-overlay-symlinks-arch.tar.xz /tmp
 RUN tar -C /root-out -Jxpf /tmp/s6-overlay-symlinks-arch.tar.xz
 
+#########################
+# Runtime stage
+
+FROM scratch
+COPY --from=rootfs-stage /root-out/ /
+
 ARG BUILD_DATE
 ARG BUILD_APP_VERSION
 ARG MODS_VERSION="v3"
@@ -50,18 +68,8 @@ ADD --chmod=755 "https://raw.githubusercontent.com/linuxserver/docker-mods/mod-s
 # set environment variables
 ARG DEBIAN_FRONTEND="noninteractive"
 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:$PATH"
-
-# environment variables
-ENV PS1="$(whoami)@$(hostname):$(pwd)\\$ " \
-  HOME="/root" \
+  LANGUAGE="en_US.UTF-8" \
+  LANG="en_US.UTF-8" \
   TERM="xterm" \
   S6_CMD_WAIT_FOR_SERVICES_MAXTIME="0" \
   S6_VERBOSITY=1 \
@@ -128,9 +136,9 @@ RUN \
   rm -f /etc/apt/sources.list.d/debian.sources && \
   echo "**** generate locale ****" && \
   locale-gen en_US.UTF-8 && \
-  echo "**** create abc user and make our folders ****" && \
-  useradd -u ${BUILD_APP_UID} -U -d /config -s /bin/false ${USER} && \
-  usermod -G users ${USER} && \
+  echo "**** create pi user and make our folders ****" && \
+  useradd -u 911 -U -d /config -s /bin/false ${BUILD_APP_USER} && \
+  usermod -G users ${BUILD_APP_USER} && \
   mkdir -p \
     /app \
     /config \