alpine: Move docker-start to Docker build

The standard Alpine package should not install docker glue,
so remove it from the APKBUILD and install it in the Dockerfile
instead.

alpine/APKBUILD.in

@@ -60,7 +60,6 @@ package() {
 	cd "$builddir"
 	make DESTDIR="$pkgdir" install
 
-	install -Dm755 "$srcdir"/docker-start "$pkgdir"$_sbindir
 	install -Dm644 "$srcdir"/daemons "$pkgdir"$_sysconfdir
 	install -d "$pkgdir"/etc/init.d
 	ln -s ${_sbindir}/frr "$pkgdir"/etc/init.d/frr

docker/alpine/Dockerfile

@@ -32,4 +32,5 @@ RUN mkdir -p /pkgs/apk
 COPY --from=alpine-builder /pkgs/apk/ /pkgs/apk/
 RUN apk add --no-cache tini
 RUN apk add --no-cache --allow-untrusted /pkgs/apk/x86_64/*.apk
+COPY docker/alpine/docker-start /usr/lib/frr/docker-start
 ENTRYPOINT [ "/sbin/tini", "--", "/usr/lib/frr/docker-start" ]

docker/alpine/docker-start

@@ -6,5 +6,7 @@ set -e
 # For volume mounts...
 ##
 chown -R frr:frr /etc/frr
-/etc/init.d/frr start
-exec sleep 10000d
+/usr/lib/frr/frrinit.sh start
+
+# Sleep forever
+exec tail -f /dev/null