Add image builder action to staffeln
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..b21c967
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,18 @@
+# syntax=docker/dockerfile-upstream:master-labs
+
+ARG BUILDER_IMAGE=quay.io/vexxhost/openstack-builder-focal
+ARG RUNTIME_IMAGE=quay.io/vexxhost/openstack-runtime-focal
+
+# hadolint ignore=DL3007
+FROM quay.io/vexxhost/bindep-loci:latest AS bindep
+
+FROM ${BUILDER_IMAGE}:ced4522d9a10ba7172f373289af6dace06be3b36 AS builder
+COPY --from=bindep --link /runtime-pip-packages /runtime-pip-packages
+
+FROM ${RUNTIME_IMAGE}:a391e31bb33041611e2aa2797debcb21e6f221cd AS runtime
+COPY --from=bindep --link /runtime-dist-packages /runtime-dist-packages
+COPY --from=builder --link /var/lib/openstack /var/lib/openstack
+# hadolint ignore=DL3022
+COPY --from=docker.io/alpine/helm:3.11.2 /usr/bin/helm /usr/local/bin/helm
+# hadolint ignore=DL3022
+COPY --from=gcr.io/go-containerregistry/crane /ko-app/crane /usr/local/bin/crane