server {
    listen 80;
    server_name _;

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

    # SPA client-side routing: fall back to index.html
    location / {
        try_files $uri $uri/ /index.html;
    }

    # Proxy API calls to the backend service (session cookie preserved)
    location /api/ {
        proxy_pass http://app:8080;
        proxy_http_version 1.1;
        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_cookie_path / /;
    }
}