Experiment by removing noninteractive frontend

Setting `DEBIAN_FRONTEND=noninteractive` is discouraged and may not be necessary so let's see if it still builds ok without it. It should tidy up the commands listed for each layer on docker hub so that (more of) the command is visible too.

Dockerfile

@@ -17,7 +17,7 @@ LABEL maintainer="Ben Evans <[email protected]>" \
     org.opencontainers.image.documentation="https://chaste.github.io/docs/installguides/docker/"
 
 USER root
-ARG DEBIAN_FRONTEND=noninteractive
+# ARG DEBIAN_FRONTEND=noninteractive
 # Declare BASE in this build stage (the value is inherited from the global stage)
 # https://github.com/moby/moby/issues/34482
 ARG BASE