smtp_email_aggregator_relay.service

[Unit]
Description=SMTP Email Aggregator Relay

[Service]
ExecStart=/path/to/installation/bin/start.js
Restart=always
User=root
Group=root
Environment=PATH=/usr/bin:/usr/local/bin
Environment=NODE_ENV=production
WorkingDirectory=/path/to/installation

[Install]
WantedBy=multi-user.target