server {
    listen 80;
    server_name _;

    root /var/www/Advanced-Smtp-Tester;
    index index.html;

    # Serve static frontend files
    location / {
        try_files $uri $uri/ =404;
    }

    # Proxy API requests to Node.js app
    location /api {
        proxy_pass http://localhost:4001;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
    }
    
    # Increase body size for larger payloads if needed
    client_max_body_size 10M;
}