nginx.conf

server {
    listen 3663 ssl http2;
    listen [::]:3663 ssl http2;
    server_name your_domain.com; # Replace with your actual domain or IP

    # SSL Configuration
    ssl_certificate /path/to/your/fullchain.pem; # Replace with your certificate path
    ssl_certificate_key /path/to/your/privkey.pem; # Replace with your private key path
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers HIGH:!aNULL:!MD5;
    ssl_prefer_server_ciphers on;
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 10m;

    location / {
        proxy_pass http://localhost:3663; # Forward to the SSE server

        # Headers required for SSE
        proxy_set_header Host $host;
        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;

        # Buffering settings for SSE
        proxy_buffering off;
        proxy_cache off;
        proxy_read_timeout 86400s; # Keep connection open for a long time
        proxy_send_timeout 86400s;
        proxy_connect_timeout 75s;

        # Required for SSE event stream
        proxy_set_header Connection '';
        proxy_http_version 1.1;
        chunked_transfer_encoding off;
    }

    # Optional: Add access and error logs
    access_log /var/log/nginx/sse_proxy_access.log;
    error_log /var/log/nginx/sse_proxy_error.log;
}