fix: Use correct http code

main.py

@@ -1576,7 +1576,7 @@ def api_status():
     # This doesn't require a login
     # Check if the node is connected
     if not account_module.hsdConnected():
-        return jsonify({"status":400,"error": "Node not connected"}), 400
+        return jsonify({"status":503,"error": "Node not connected"}), 503
     return jsonify({"status": 200,"result": "FireWallet is running"})