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

    # Never cache HTML files - ADD THIS
    location ~* \.html$ {
        expires -1;
        add_header Cache-Control "no-cache, no-store, must-revalidate" always;
        add_header Pragma "no-cache" always;
    }

    # Special handling for root index.html - ADD THIS
    location = / {
        try_files /index.html =404;
        expires -1;
        add_header Cache-Control "no-cache, no-store, must-revalidate" always;
        add_header Pragma "no-cache" always;
    }

    # Handle React Router (SPA) - MODIFY THIS
    location / {
        try_files $uri $uri/ @fallback;
    }
    
    # Fallback for SPA routing - ADD THIS
    location @fallback {
        rewrite ^.*$ /index.html last;
        expires -1;
        add_header Cache-Control "no-cache, no-store, must-revalidate" always;
        add_header Pragma "no-cache" always;
    }

    # Cache static assets with hashes - EXPAND THIS
    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2)$ {
        expires 1y;
        add_header Cache-Control "public, immutable" always;
    }
}