Initialize piNail project with modern piNail2 web controller

piNail2/pinail.service

@@ -0,0 +1,20 @@
+[Unit]
+Description=piNail2 E-Nail Temperature Controller
+After=network.target
+
+[Service]
+Type=simple
+User=pi
+WorkingDirectory=/home/pi/piNail2
+ExecStart=/usr/bin/python3 app.py
+Restart=on-failure
+RestartSec=5
+StandardOutput=journal
+StandardError=journal
+
+# Safety: if the service crashes, GPIO cleanup happens in the app.
+# But as an extra safety net, run a one-shot relay-off on stop.
+ExecStopPost=/bin/bash -c 'echo "2" > /sys/class/gpio/unexport 2>/dev/null || true'
+
+[Install]
+WantedBy=multi-user.target