<html>
          <head><title>Frontend Demo</title></head>
          <script src="https://browser.sentry-cdn.com/7.119.0/bundle.min.js" crossorigin="anonymous"></script>
          <script>Sentry.init({ dsn: "https://b1c99d545108413fbc9ee8d225d0e188@errors.smala.lt/2" });</script>
          <body>
            <h1>Frontend Demo -- Review Apps v4</h1>
            <p>This page is served by frontend-demo.</p>
            <h2>Backend response:</h2>
            <pre id="backend">Loading...</pre>
            <h2>Error tracking:</h2>
            <button onclick="throw new Error(&#39;Test error from frontend-demo&#39;)">Send test error to GlitchTip</button>
            <script>
              fetch("/api/")
                .then(r => r.text())
                .then(t => document.getElementById("backend").textContent = t)
                .catch(e => document.getElementById("backend").textContent = "ERROR: " + e);
            </script>
          </body>
        </html>