Build multi-arch container images across stack
diff --git a/apps/matrix/capture-config/Dockerfile b/apps/matrix/capture-config/Dockerfile
index 87f358c..bcecf7b 100644
--- a/apps/matrix/capture-config/Dockerfile
+++ b/apps/matrix/capture-config/Dockerfile
@@ -1,4 +1,6 @@
 FROM alpine:latest
 
-COPY capture-config /usr/bin
+ARG TARGETARCH
+
+COPY capture-config_${TARGETARCH} /usr/bin/capture-config
 RUN chmod +x /usr/bin/capture-config