text: import React from "react";
  import { BrowserRouter, Route, Switch } from "react-router-dom";
  import UsageViewer from "./components/UsageViewer";
  import { NotFound } from "./components/common/Error";
  
  export default function App() {
    return (
      <div className="App">
        <BrowserRouter>
          <Switch>
            <Route exact path="/" component={UsageViewer} />
            <Route component={NotFound} />
          </Switch>
        </BrowserRouter>
      </div>
    );
  }
  