script: add provisional x11 setup script

scripts/setup-X11.sh

@@ -0,0 +1,43 @@
+## This script installs X11 and sets up a xinit service
+## xterm is running in foreground until the klipperscreen
+## container connects to the xserver
+
+#!/bin/bash -xe
+
+## Name of the new user
+USER=screen
+
+## Create User
+adduser --system --disabled-password --no-create-home ${USER}
+
+## Install Packages
+apt update
+apt install -y
+  xterm
+  xinit
+  xinput
+  xserver-xorg
+  x11-xserver-utils
+  xserver-xorg-video-fbdev
+
+## Allow any User to start X
+sed -i 's/allowed_users=console/allowed_users=anybody/g' /etc/X11/Xwrapper.config || true
+
+## Create the xinit systemd service
+cat <<EOF > /etc/systemd/system/xinit.service
+[Unit]
+Description=Autologin to X
+After=systemd-user-sessions.service
+
+[Service]
+User=${USER}
+ExecStart=/usr/bin/xinit /usr/bin/xterm -maximized
+
+[Install]
+WantedBy=multi-user.target
+EOF
+
+## Reload, enable and start the xinit service
+systemctl daemon-reload
+systemctl enable xinit.service
+systemctl start xinit