pkg: add acpid

Adds a new service for running `/sbin/acpid` that comes with busybox.
The VM will shut down if the power button is pressed.

Signed-off-by: Magnus Skjegstad <magnus@skjegstad.com>

pkg/acpid/Dockerfile

@@ -0,0 +1,22 @@
+FROM linuxkit/alpine:2e362f4459ba4491655061cccdd2fcc7a2de5eb3 AS mirror
+
+RUN mkdir -p /out/etc/apk && cp -r /etc/apk/* /out/etc/apk/
+RUN apk add --no-cache --initdb -p /out \
+    alpine-baselayout \
+    busybox
+RUN rm -rf /out/etc/apk /out/lib/apk /out/var/cache
+
+FROM linuxkit/alpine:2e362f4459ba4491655061cccdd2fcc7a2de5eb3 AS mirror2
+RUN mkdir -p /out/etc/apk && cp -r /etc/apk/* /out/etc/apk/
+RUN apk add --no-cache --initdb -p /out \
+    busybox-initscripts
+RUN rm -rf /out/etc/apk /out/lib/apk /out/var/cache
+
+FROM scratch
+COPY --from=mirror /out/ /
+COPY --from=mirror2 /out/etc/acpi /etc/acpi
+
+CMD ["/sbin/acpid", "-f", "-d"]
+
+LABEL org.mobyproject.config='{"binds": ["/dev:/dev"], "pid": "host"}'
+

pkg/acpid/Makefile

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+IMAGE=acpid
+
+include ../package.mk