Build multi-arch container with manifest

hooks/pre_build

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+# Update to docker-ee 18.x for manifests
+apt-get -y update
+apt-get -y --only-upgrade install docker-ee
+# Register qemu-*-static for all supported processors except the
+# current one, but also remove all registered binfmt_misc before
+docker run --rm --privileged multiarch/qemu-user-static:register --reset