Rebase on Alpine

Using Alpine instead of Fedora Minimal reduces the size of the final
image from 175 MB to 50 MB.  This should speed up execeution on slow
machines like Raspberry Pis.

Containerfile

@@ -1,40 +1,21 @@
-FROM registry.fedoraproject.org/fedora-minimal:39 AS build
+FROM docker.io/library/alpine:3.19
-
-ARG CUE_VERSION=0.7.0
 
 RUN --mount=type=cache,target=/var/cache \
-	microdnf install -y \
+	apk add \
-		--setopt install_weak_deps=0 \
-		gzip \
-		tar \
-	&& ARCH=$(uname -m) \
-	&& case "${ARCH}" in \
-		x86_64) ARCH=amd64 ;; \
-		aarch64) ARCH=arm64 ;; \
-	esac \
-	&& url="https://github.com/cue-lang/cue/releases/download/v${CUE_VERSION}/cue_v${CUE_VERSION}_linux_${ARCH}.tar.gz" \
-	&& curl -fsSL "${url}" \
-	| tar -C /usr/local/bin -xz cue \
-	&& :
-
-
-FROM git.pyrocufflink.net/containerimages/tmpl
-
-RUN --mount=type=cache,target=/var/cache \
-	--mount=type=bind,from=build,source=/,target=/build \
-	microdnf install -y \
-		--setopt install_weak_deps=0 \
 		age \
-		git-core \
+		git \
 	&& ln -snf /host/etc/passwd /etc/passwd \
 	&& ln -snf /host/etc/group /etc/group \
-	&& cp -a /build/usr/local/bin/cue /usr/local/bin/ \
 	&& for cmd in \
 		systemctl \
 		systemd-sysusers \
 	; do ln -s nsenter.sh /usr/local/bin/${cmd}; done \
 	&& :
 
+COPY --from=docker.io/cuelang/cue:0.7.0 /usr/bin/cue /usr/local/bin/cue
+
+COPY --from=git.pyrocufflink.net/containerimages/tmpl /tmpl /usr/local/bin/tmpl
+
 COPY nsenter.sh /usr/local/bin/nsenter.sh
 
 COPY config.sh /
@@ -42,6 +23,3 @@ COPY config.sh /
 ENTRYPOINT []
 
 CMD ["/config.sh"]
-
-LABEL license= \
-	vendor='Dustin C. Hatch' \