remove maintenance view, set up index

src/index.tsx

@@ -1,5 +1,12 @@
-import "./View/maintenance";
-
+import ConnectionModel from "./Model/connectionModel";
 import StorageModel from "./Model/storageModel";
 
-const storageModel = new StorageModel();
+const storageModel = new StorageModel();
+const connectionModel = new ConnectionModel({
+    connectionChangeHandler() {
+        
+    },
+    messageHandler(data) {
+        
+    },
+})