server {
    listen 80;
    root /usr/share/nginx/html;
    index index.html;

    # 1. Configuración para React Router
    location / {
        try_files $uri $uri/ /index.html;
    }

    # 2. PROXY INVERSO
    location /api/ {
        proxy_pass http://backend:8080;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection keep-alive;
        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;
        proxy_cache_bypass $http_upgrade;
    }
}