Add default execution on apptainer instance start again

Author: TomeMD

container/stress.def

@@ -17,4 +17,5 @@ From: debian:bullseye-slim
 %startscript
   OUT_DIR=/tmp/out
   mkdir -p $OUT_DIR
-  cd /tmp
+  cd /tmp
+  /usr/local/bin/stress-system/run.sh "$@" -o $OUT_DIR