allow to start rpi/clone script outside rpi subdirectory

rpi/clone

@@ -2,6 +2,9 @@
 import os
 import time
 
+# go to script directory
+os.chdir(os.path.dirname(__file__))
+
 HOST = "l_samenv@samenv"
 SUBDIR = "boxes/rpi_images"
 DEFDEST = f"{HOST}:{SUBDIR}"