Update base image to Ubuntu 24.04

config/X11/Xsession.d/60xdg

@@ -0,0 +1,17 @@
+#!/bin/sh
+
+# shellcheck disable=SC2034
+{
+	set -a
+	XDG_DATA_DIRS=/usr/share/xubuntu:/usr/share/xfce4:/usr/local/share:/usr/share
+	XDG_CONFIG_DIRS=/etc/xdg/xdg-xubuntu:/etc/xdg
+	XDG_CURRENT_DESKTOP=XFCE
+	XDG_SESSION_DESKTOP=xubuntu
+	XDG_SESSION_TYPE=x11
+	XDG_MENU_PREFIX=xfce-
+	XDG_DATA_HOME="${HOME:?}"/.local/share
+	XDG_CONFIG_HOME="${HOME:?}"/.config
+	XDG_CACHE_HOME="${HOME:?}"/.cache
+	XDG_RUNTIME_DIR=/run/user/"$(id -u)"
+	set +a
+}