server {
    listen 8080;
    server_name localhost;

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

    server_tokens off;

    gzip on;
    gzip_vary on;
    gzip_comp_level 6;
    gzip_min_length 256;
    gzip_types
        text/plain
        text/css
        text/xml
        application/json
        application/javascript
        application/xml
        image/svg+xml;

    # NOTE: add_header does not inherit into a location block that sets
    # its own add_header, so these three lines are repeated in every
    # location below rather than declared once here.

    location = /health {
        access_log off;
        return 200 "ok\n";
        add_header Content-Type text/plain always;
        add_header X-Content-Type-Options "nosniff" always;
        add_header X-Frame-Options "DENY" always;
        add_header Referrer-Policy "strict-origin-when-cross-origin" always;
    }

    # Hashed build assets (Vite output) can be cached forever.
    location /assets/ {
        try_files $uri =404;
        add_header Cache-Control "public, max-age=31536000, immutable" always;
        add_header X-Content-Type-Options "nosniff" always;
        add_header X-Frame-Options "DENY" always;
        add_header Referrer-Policy "strict-origin-when-cross-origin" always;
    }

    # index.html must always be revalidated so SPA routing/asset
    # references stay in sync with the latest deployed build.
    location = /index.html {
        add_header Cache-Control "no-cache" always;
        add_header X-Content-Type-Options "nosniff" always;
        add_header X-Frame-Options "DENY" always;
        add_header Referrer-Policy "strict-origin-when-cross-origin" always;
    }

    location / {
        try_files $uri $uri/ /index.html;
        add_header X-Content-Type-Options "nosniff" always;
        add_header X-Frame-Options "DENY" always;
        add_header Referrer-Policy "strict-origin-when-cross-origin" always;
    }

    location ~ /\. {
        deny all;
    }
}