server {
    listen 80;
    server_name localhost;

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

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

    # Optional: Add headers for PWA, security, etc.
    # location ~* \.(?:manifest\.json)$ {
    #   add_header Cache-Control "no-cache";
    # }
}