Updating README with graphical startup info

README.md

@@ -4,14 +4,55 @@ A GUI application for my raspberry PI to show my name and other cool stuff.
 
 ## Notes
 
+### GPIO access
 Be sure to install wiringpi: `sudo apt install wiringpi`
 
+### Graphics
 To install the embedded (egl) version of javafx, you need [the overlay](https://chriswhocodes.com/) for java 8.
 Specifically the "OpenJFX 8 nightly for armv6hf with libbrcm fix" version
 
 After updating or anythinging the JDK on that guy, go to the `/usr/lib/jvm/<your java>/` and extract the zip
 to get the right things into your system.
 
+### Systemd init script
+
+I use the `/etc/default/deskscreen` to contain the environment variables to configure my application.
+```
+[Unit]
+Description=Desk Screen Application
+
+[Service]
+EnvironmentFile=/etc/default/deskscreen
+# Has to run as root to enable framebuffer and touch input stuff
+User=root
+WorkingDirectory=/opt/deskscreen/data
+ExecStart=/opt/deskscreen/jfx
+SuccessExitStatus=143
+TimeoutStopSec=10
+Restart=on-failure
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target
+```
+
+### jfx app script
+
+```
+#!/bin/bash
+
+# Is the magic JFX runtime jar to start things with a native GUI
+#  /usr/lib/jvm/java-8-openjdk-armhf/jre/lib/ext/jfxrt.jar
+
+# Application jarfile name
+JARFILE=deskScreen-all.jar
+
+exec java -Dglass.platform=Monocle \
+  -Dprism.verbose=true \
+  -cp /usr/lib/jvm/java-8-openjdk-armhf/jre/jre/lib/ext/jfxrt.jar:/opt/deskscreen/${JARFILE} is.kow.deskscreen.DeskScreenKt
+```
+
+
 
 ### NWS Graphical forecast XML details