server {
    listen 8080;
    server_name _;

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

    server_tokens off;
    client_max_body_size 3m;

    # Security headers
    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;
    add_header Permissions-Policy "camera=(), microphone=(), geolocation=()" always;
    add_header Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src https://fonts.gstatic.com; img-src 'self' data: blob:; connect-src 'self'; frame-ancestors 'none'; base-uri 'self'; form-action 'self'" always;

    gzip on;
    gzip_types text/css application/javascript application/json image/svg+xml;

    # API proxied to the backend container
    location /api/ {
        proxy_pass http://api:3000;
        proxy_http_version 1.1;
        proxy_set_header Host $http_host;
        proxy_set_header X-Forwarded-Host $http_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;
    }

    # Uploaded images: served directly from the shared volume, never executed
    location /uploads/ {
        alias /var/www/uploads/;
        types { image/jpeg jpg; image/png png; image/webp webp; }
        default_type application/octet-stream;
        # user-uploaded content: never allow it to script or be framed
        add_header Content-Security-Policy "default-src 'none'; frame-ancestors 'none'" always;
        add_header X-Content-Type-Options "nosniff" always;
        add_header Content-Disposition "inline" always;
        add_header Cache-Control "public, max-age=86400" always;
    }

    # Static assets (immutable hashed filenames from Vite)
    location /assets/ {
        add_header Cache-Control "public, max-age=31536000, immutable" always;
        add_header X-Content-Type-Options "nosniff" always;
        try_files $uri =404;
    }

    # SPA fallback
    location / {
        try_files $uri /index.html;
    }
}