nginx-x402chat.conf

# nginx configuration for x402chat
#
# Quick Setup (run from x402chat directory):
#   sed "s|{{DOMAIN}}|yourdomain.com|g" nginx-x402chat.conf | sudo tee /etc/nginx/sites-available/x402chat
#   sudo ln -s /etc/nginx/sites-available/x402chat /etc/nginx/sites-enabled/
#   sudo certbot --nginx -d yourdomain.com -d www.yourdomain.com
#   sudo nginx -t && sudo systemctl reload nginx

# Redirect HTTP to HTTPS
server {
    listen 80;
    listen [::]:80;
    server_name {{DOMAIN}} www.{{DOMAIN}};

    location /.well-known/acme-challenge/ {
        root /var/www/html;
    }

    location / {
        return 301 https://$host$request_uri;
    }
}

# Main HTTPS server
server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name {{DOMAIN}} www.{{DOMAIN}};

    # SSL certificates (created by certbot)
    ssl_certificate /etc/letsencrypt/live/{{DOMAIN}}/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/{{DOMAIN}}/privkey.pem;

    # SSL security settings
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_prefer_server_ciphers on;
    ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384;
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 1d;

    # Security headers
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header X-XSS-Protection "1; mode=block" always;

    # Proxy settings
    location / {
        proxy_pass http://127.0.0.1:8765;
        proxy_http_version 1.1;

        # WebSocket support (critical for dashboard/overlay)
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";

        # Forward client info
        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;

        # Timeouts for long-polling/WebSocket
        proxy_connect_timeout 60s;
        proxy_send_timeout 60s;
        proxy_read_timeout 300s;  # 5 min for WebSocket connections
    }

    # Health check endpoint (for monitoring)
    location /health {
        proxy_pass http://127.0.0.1:8765/health;
        proxy_http_version 1.1;
        proxy_set_header Host $host;

        # Allow health checks without rate limiting
        access_log off;
    }
}