build proper dockerized example

docker/root/scripts/password_reset.py

@@ -0,0 +1,12 @@
+#!/usr/bin/python
+import string
+import random
+from subprocess import call
+
+new_password = ''.join(random.SystemRandom()
+                       .choice(string.ascii_uppercase + string.digits)
+                       for _ in range(16))
+
+call("/bin/echo -e \"{}\\n{}\" | passwd myuser"
+     .format(new_password, new_password), shell=True)
+