fix Dockerfile

Dockerfile

@@ -1,10 +1,20 @@
 # syntax=docker/dockerfile:1
 ARG BUILD_BASE_IMAGE=alpine:latest
+
 FROM ${BUILD_BASE_IMAGE} AS rootfs-stage
 
-# environment
-ENV REL=${BUILD_DEBIAN_REL}
-ENV ARCH=${BUILD_DEBIAN_ARCH}
+ARG BUILD_APP_VERSION
+ARG BUILD_S6_ARCH_amd64
+ARG BUILD_S6_OVERLAY_VERSION
+ARG ROOTFS=/root-out
+ARG REL=${BUILD_APP_VERSION}
+ARG ARCH=x86_64
+ARG MIRROR=http://dl-cdn.alpinelinux.org/alpine
+ARG PACKAGES=alpine-baselayout,\
+alpine-keys,\
+apk-tools,\
+busybox,\
+libc-utils
 
 # install packages
 RUN \
@@ -14,32 +24,26 @@ RUN \
     tzdata \
     xz
 
-# grab base tarball
+# build rootfs
 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/*
-
-# set version for s6 overlay
-ARG S6_OVERLAY_VERSION=${BUILD_S6_OVERLAY_VERSION}
-ARG S6_OVERLAY_ARCH=${BUILD_S6_ARCH_amd64}
+  mkdir -p "${ROOTFS}/etc/apk" && \
+  { \
+    echo "${MIRROR}/${REL}/main"; \
+    echo "${MIRROR}/${REL}/community"; \
+  } > "${ROOTFS}/etc/apk/repositories" && \
+  apk --root "${ROOTFS}" --no-cache --keys-dir /etc/apk/keys add --arch ${BUILD_S6_ARCH_amd64} --initdb ${PACKAGES//,/ } && \
+  sed -i -e 's/^root::/root:!:/' /root-out/etc/shadow
 
 # add s6 overlay
-ADD https://github.com/just-containers/s6-overlay/releases/download/v${S6_OVERLAY_VERSION}/s6-overlay-noarch.tar.xz /tmp
+ADD https://github.com/just-containers/s6-overlay/releases/download/v${BUILD_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${S6_OVERLAY_VERSION}/s6-overlay-${S6_OVERLAY_ARCH}.tar.xz /tmp
-RUN tar -C /root-out -Jxpf /tmp/s6-overlay-${S6_OVERLAY_ARCH}.tar.xz
+ADD https://github.com/just-containers/s6-overlay/releases/download/v${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 s6 optional symlinks
-ADD https://github.com/just-containers/s6-overlay/releases/download/v${S6_OVERLAY_VERSION}/s6-overlay-symlinks-noarch.tar.xz /tmp
+ADD https://github.com/just-containers/s6-overlay/releases/download/v${BUILD_S6_OVERLAY_VERSION}/s6-overlay-symlinks-noarch.tar.xz /tmp
 RUN tar -C /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${S6_OVERLAY_VERSION}/s6-overlay-symlinks-arch.tar.xz /tmp
+ADD https://github.com/just-containers/s6-overlay/releases/download/v${BUILD_S6_OVERLAY_VERSION}/s6-overlay-symlinks-arch.tar.xz /tmp
 RUN tar -C /root-out -Jxpf /tmp/s6-overlay-symlinks-arch.tar.xz
 
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