Update test_websocket.html to use Caddy proxy URL and send JSON

weather_overlay/test_websocket.html

@@ -9,7 +9,7 @@
         <button onclick="sendMessage()">Send</button>
         <ul id="messages"></ul>
         <script>
-            const ws = new WebSocket("ws://localhost:8000/ws");
+            const ws = new WebSocket("wss://overlays.ramforth.net/weather_ws");
             ws.onmessage = function(event) {
                 const messages = document.getElementById('messages');
                 const message = document.createElement('li');
@@ -19,8 +19,11 @@
             };
             function sendMessage() {
                 const input = document.getElementById("message");
-                ws.send(input.value);
-                input.value = '';
+                const location = input.value;
+                if (location) {
+                    ws.send(JSON.stringify({ "location": location }));
+                    input.value = '';
+                }
             }
         </script>
     </body>