Add install script (#67)

scripts/install.sh

@@ -0,0 +1,49 @@
+#!/bin/bash
+
+if [ "$(id -u)" != "0" ]; then
+   echo "This script must be run as root" 1>&2
+   exit 1
+fi
+
+echo "This is the installation script for PhotonVision."
+
+echo "Installing the JDK..."
+if [ $(dpkg-query -W -f='${Status}' openjdk-11-jdk-headless 2>/dev/null | grep -c "ok installed") -eq 0 ];
+then
+   apt update
+   apt-get install openjdk-11-jdk-headless;
+fi
+echo "JDK installation complete."
+
+
+echo "Downloading latest stable release of PhotonVision..."
+mkdir -p /opt/photonvision
+cd /opt/photonvision
+curl -s https://api.github.com/repos/photonvision/photonvision/releases/latest | 
+    grep "browser_download_url.*jar" | 
+    cut -d : -f 2,3 | 
+    tr -d '"' | 
+    wget -qi - -O photonvision.jar
+echo "Downloaded latest stable release of PhotonVision."
+
+echo "Creating the PhotonVision systemd service..."
+cd /lib/systemd/system/
+touch photonvision.service
+printf \
+"[Unit]
+Description=Service that runs PhotonVision
+
+[Service]
+WorkingDirectory=/opt/photonvision
+ExecStart=/usr/bin/java -jar /opt/photonvision/photonvision.jar
+    
+[Install]
+WantedBy=multi-user.target" >> photonvision.service
+cp photonvision.service /etc/systemd/system/photonvision.service
+chmod 644 /etc/systemd/system/photonvision.service
+systemctl daemon-reload
+systemctl enable photonvision.service
+
+echo "Created PhotonVision systemd service."
+
+echo "PhotonVision installation successful."