Nginx

location /api/track.js {
    proxy_pass https://your-postmetric-domain.com/api/track.js;
    proxy_set_header Host your-postmetric-domain.com;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto $scheme;

    # Set content type
    add_header Content-Type application/javascript;
}

location /api/track {
    proxy_pass https://your-postmetric-domain.com/api/track;
    proxy_set_header Host your-postmetric-domain.com;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto $scheme;
}

sudo nginx -t
sudo systemctl reload nginx

<script src="https://your-domain.com/api/track.js?site=YOUR_TRACKING_CODE"></script>