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# Create a service unit file
# /etc/systemd/system/myapp.service
[Unit]
Description=My Application
After=network.target

[Service]
Type=simple
User=appuser
WorkingDirectory=/opt/myapp
ExecStart=/usr/bin/node /opt/myapp/server.js
Restart=on-failure
RestartSec=5
Environment=NODE_ENV=production

[Install]
WantedBy=multi-user.target

# Reload systemd after creating/modifying the file
sudo systemctl daemon-reload

# Start, enable (auto-start on boot), and check status
sudo systemctl start myapp
sudo systemctl enable myapp
sudo systemctl status myapp

# View logs for the service
journalctl -u myapp -f