add post-install script to launch piplotter as systemd service

install_scripts/create_service.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+cp -a "install_scripts/piplotter.service" /etc/systemd/system
+chown root:root /etc/systemd/system/piplotter.service
+
+systemctl daemon-reload
+systemctl enable piplotter.service