Update mvn-entrypoint.sh

mvn-entrypoint.sh

@@ -26,13 +26,13 @@ copy_reference_files() {
   if (touch "${log}" > /dev/null 2>&1)
   then
       echo "--- Copying files at $(date)" >> "$log"
-      find /usr/share/maven/ref/ -type f -exec bash -eu -c 'copy_reference_file /usr/share/maven/ref/ "$1" "$2"' _ {} "$log" \;
+      find /usr/share/maven/ref/ -type f -exec sh -c 'copy_reference_file /usr/share/maven/ref/ "$1" "$2"' _ {} "$log" \;
   else
     echo "Can not write to ${log}. Wrong volume permissions? Carrying on ..."
   fi
 }
 
-export -f copy_reference_file
+export copy_reference_file
 copy_reference_files
 
 exec "$@"