Add grow system service

service/README.md

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+# Grow Service
+
+This script will install Grow as a service on your Raspberry Pi, allowing it to run from boot and recover from errors.
+
+# Useful Commands
+
+* View service status: `systemctl status grow-monitor`
+* Stop service: `sudo systemctl stop grow-monitor`
+* Start service: `sudo systemctl start grow-monitor`
+* View full debug/error output: `journalctl --no-pager --unit grow-monitor`
+
+# Configuring Grow
+
+You can configure grow using the on-screen UI, or by editing the settings in `/etc/default/grow`

service/grow-monitor.service

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+[Unit]
+Description=Grow Monitoring Service
+After=multi-user.target
+
+[Service]
+Type=simple
+WorkingDirectory=/usr/share/grow-monitor
+ExecStart=/usr/bin/grow-monitor /etc/default/grow
+Restart=on-failure
+StandardOutput=syslog+console
+StandardError=syslog+console
+
+[Install]
+WantedBy=multi-user.target

service/install.sh

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+#!/bin/bash
+
+user_check() {
+	if [ $(id -u) -ne 0 ]; then
+		printf "Script must be run as root. Try 'sudo ./install.sh'\n"
+		exit 1
+	fi
+}
+
+success() {
+	echo -e "$(tput setaf 2)$1$(tput sgr0)"
+}
+
+inform() {
+	echo -e "$(tput setaf 6)$1$(tput sgr0)"
+}
+
+warning() {
+	echo -e "$(tput setaf 1)$1$(tput sgr0)"
+}
+
+user_check
+
+inform "Copying icons to /usr/share/grow-monitor...\n"
+mkdir -p /usr/share/grow-monitor/icons
+cp ../examples/icons/* /usr/share/grow-monitor/icons
+
+inform "Installing grow-monitor to /usr/bin/grow-monitor...\n"
+cp ../examples/monitor.py /usr/bin/grow-monitor
+chmod +x /usr/bin/grow-monitor
+
+inform "Installing settings to /etc/default/grow...\n"
+cp ../examples/settings.yml /etc/default/grow
+
+inform "Installing systemd service...\n"
+cp grow-monitor.service /etc/systemd/system/
+systemctl reenable grow-monitor.service
+systemctl start grow-monitor.service
+
+inform "\nTo see grow debug output, run: \"journalctl --no-pager --unit grow-monitor\"\n"