Try without mkdir for debconf

Author: tcely

Dockerfile

@@ -76,7 +76,7 @@ RUN --mount=type=cache,id=apt-lib-cache-${TARGETARCH},sharing=private,target=/va
         'Dir::Cache::%spkgcache "";\n' '' src ; \
     chmod a+r /etc/apt/apt.conf.d/docker-disable-pkgcache ; \
     # Create the directory for debconf
-    mkdir -v /var/cache/debconf/docker-templates ; \
+    # mkdir -v /var/cache/debconf/docker-templates ; \
     set -x && \
     apt-get update && \
     # Install locales