Add systemd service setup script for production deployment

scripts/setup-service.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+set -e
+
+SERVICE_NAME="dataflow"
+SERVICE_FILE="/etc/systemd/system/${SERVICE_NAME}.service"
+WORKDIR=$(pwd)
+
+echo "Creating systemd service file..."
+sudo tee "$SERVICE_FILE" > /dev/null <<EOF
+[Unit]
+Description=Dataflow API Server
+After=postgresql.service
+Wants=postgresql.service
+
+[Service]
+Type=simple
+User=www-data
+WorkingDirectory=${WORKDIR}
+Environment=NODE_ENV=production
+ExecStart=/usr/bin/node api/server.js
+Restart=always
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target
+EOF
+
+echo "Reloading systemd daemon..."
+sudo systemctl daemon-reload
+
+echo "Enabling dataflow service..."
+sudo systemctl enable "$SERVICE_NAME"
+
+echo "Starting dataflow service..."
+sudo systemctl start "$SERVICE_NAME"
+
+echo "Done! Service status:"
+sudo systemctl status "$SERVICE_NAME" --no-pager