Fix up selecting first player and some errors in the number generation.

templates/index.html

@@ -7,6 +7,7 @@
 
         <script src="https://cdn.socket.io/4.5.4/socket.io.min.js"></script>
         <script src="https://cdnjs.cloudflare.com/ajax/libs/crypto-js/4.1.1/crypto-js.min.js"></script>
+        <script src="{{ url_for('static', filename='js/shim.js') }}"></script>
         <script src="{{ url_for('static', filename='js/index.js') }}"></script>
         <script src="{{ url_for('static', filename='js/player.js') }}"></script>
         <script src="{{ url_for('static', filename='js/dom.js') }}"></script>
@@ -20,5 +21,9 @@
         </ul>
     </div>
 
+    <div id="ready">
+        <button id="ready-button">Not ready</button>
+    </div>
+
     </body>
 </html>