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

    error_page 404 /404.html;

    location / {
        try_files $uri $uri/index.html $uri.html =404;
    }

    location /api/ {
        proxy_pass http://api:3001/api/;
        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;
    }

    # Astro's hashed _astro/ files — content-addressed, safe to cache forever
    location /_astro/ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

    # Images + fonts — long cache but NOT immutable (can be updated)
    location ~* \.(png|jpg|jpeg|gif|ico|svg|woff2?)$ {
        expires 30d;
        add_header Cache-Control "public";
    }

    # HTML pages — short cache so deploys take effect quickly
    location ~* \.html$ {
        add_header Cache-Control "no-cache";
    }

    # Security headers are set on the outer (host) nginx — do NOT duplicate here
}