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

    # An nginx template: AUTH_HOST and API_HOST come from the container env at start (see Dockerfile).
    add_header Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data: https://*.steamstatic.com https://steamcdn-a.akamaihd.net https://media.steampowered.com https://images.igdb.com; font-src 'self' data:; connect-src 'self' https://${AUTH_HOST} https://${API_HOST}; manifest-src 'self'; object-src 'none'; base-uri 'self'; form-action 'self'; frame-ancestors 'none'" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
    add_header Permissions-Policy "camera=(), microphone=(), geolocation=()" always;
    # Keeps the headers above in the locations that add their own Cache-Control (nginx 1.29.3 and later).
    add_header_inherit merge;

    # Vite puts a content hash in these file names, so they never change.
    location /assets/ {
        add_header Cache-Control "public, max-age=31536000, immutable";
    }

    # Not in every nginx mime.types; browsers expect this type for the PWA manifest.
    location = /manifest.webmanifest {
        types { application/manifest+json webmanifest; }
        add_header Cache-Control "no-cache";
    }

    # index.html and /i18n/*.json keep their names across deploys. Without
    # no-cache the browser shows old translation keys or loads an old bundle.
    location / {
        index index.html index.htm;
        add_header Cache-Control "no-cache";

        # Handle React Router navigation
        try_files $uri $uri/ /index.html;
    }
}