L2SS-394: Just dump to stdout, as is normal for commands. No need for more complexity.

bin/dump_ConfigDb.sh

-if [ ${#} -ne 1 ]; then
-    echo "You must provide a file name for the TANGO_HOST DB dump!"
-    exit -1
-fi
+#!/bin/bash
 
-docker exec -it dsconfig python -m dsconfig.dump > ${1}
+# writes the JSON dump to stdout
+docker exec -it dsconfig python -m dsconfig.dump