nginx.conf.template

server {
    listen   ${PORT};
    listen   [::]:${PORT} default;

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

    server_name _; # all hostnames

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

    location / {
        try_files $uri /index.html;
        # Add headers to all responses
        add_header Cache-Control "no-cache, no-store, must-revalidate" always;
        add_header Referrer-Policy "no-referrer, strict-origin-when-cross-origin" always;
        add_header X-Content-Type-Options "nosniff" always;
        add_header X-Frame-Options "DENY" always;
        add_header X-XSS-Protection "1; mode=block" always;
        add_header Content-Security-Policy-Report-Only "${CSP_REPORT_ONLY}" always;
    }

    # TODO: add cache for static files, avoid caching config.js, index.html etc.
}