add pretty sugar day01 image

  * 80% of debug done at cfg01 host.
    so, why not to have it easier ?

Change-Id: I53a21bdde957794c951b01e7324b07982ebd857b
diff --git a/day01-image/files/etc/tmux.conf b/day01-image/files/etc/tmux.conf
new file mode 100644
index 0000000..383d6ff
--- /dev/null
+++ b/day01-image/files/etc/tmux.conf
@@ -0,0 +1,3 @@
+set -g default-terminal "screen-256color"
+set -g set-titles on
+set -g xterm-keys on