fix: git ignore paths

.gitignore

 # Auto-generated by VScode
-./vs
+.vs/
 
 # Auto-generated by Android Studio
-./idea
\ No newline at end of file
+.idea/
\ No newline at end of file

app/lib/main.dart

 import 'package:flutter/material.dart';
-import 'package:http/http.dart' as http;
-import 'dart:convert';
 import 'dart:async';
 import 'dart:io';
 
@@ -11,7 +9,7 @@ const String mapEndpoint = "update_map";
 const int fetchInterval = 5;
 
 void main() {
-  runApp(App());
+  runApp(const App());
 }
 
 class App extends StatelessWidget {