fix: ensure TARGETPLATFORM available in base

containers/debian/base.Dockerfile

@@ -5,6 +5,8 @@ ARG BUILD_IMAGE="debian_stable_base"
 
 # Minimal container based on Debian base systems for up-to-date packages. 
 FROM  ${BASE_IMAGE}
+ARG TARGETPLATFORM
+
 LABEL maintainer="Sylvester Joosten <sjoosten@anl.gov>" \
       name="${BUILD_IMAGE}" \
       march="amd64"