create simple hello world app

client/src/App.js

@@ -1,80 +1,19 @@
-import React from "react";
-import { BrowserRouter as Router, Route, Link } from "react-router-dom";
+import React, { Component } from 'react';
+import './App.css';
+import { BrowserRouter as Router, Route, Switch } from 'react-router-dom';
+import Home from './scenes/Home';
+import NotFound from './scenes/NotFound';
 
-function App() {
-  return (
-      <Router>
-        <div>
-          <ul>
-            <li>
-              <Link to="/">Home</Link>
-            </li>
-            <li>
-              <Link to="/about">About</Link>
-            </li>
-            <li>
-              <Link to="/topics">Topics</Link>
-            </li>
-          </ul>
-
-          <hr />
-
-          <Route exact path="/" component={Home} />
-          <Route path="/about" component={About} />
-          <Route path="/topics" component={Topics} />
-        </div>
-      </Router>
-  );
+class App extends Component {
+    render() {
+        return (
+            <Router>
+                <Switch>
+                    <Route exact path="/" component={Home} />
+                    <Route component={NotFound} />
+                </Switch>
+            </Router>
+        );
+    }
 }
-
-function Home() {
-  return (
-      <div>
-        <h2>Home</h2>
-      </div>
-  );
-}
-
-function About() {
-  return (
-      <div>
-        <h2>About</h2>
-      </div>
-  );
-}
-
-function Topics({ match }) {
-  return (
-      <div>
-        <h2>Topics</h2>
-        <ul>
-          <li>
-            <Link to={`${match.url}/rendering`}>Rendering with React</Link>
-          </li>
-          <li>
-            <Link to={`${match.url}/components`}>Components</Link>
-          </li>
-          <li>
-            <Link to={`${match.url}/props-v-state`}>Props v. State</Link>
-          </li>
-        </ul>
-
-        <Route path={`${match.path}/:topicId`} component={Topic} />
-        <Route
-            exact
-            path={match.path}
-            render={() => <h3>Please select a topic.</h3>}
-        />
-      </div>
-  );
-}
-
-function Topic({ match }) {
-  return (
-      <div>
-        <h3>{match.params.topicId}</h3>
-      </div>
-  );
-}
-
 export default App;

client/src/scenes/Home/index.js

@@ -0,0 +1,9 @@
+import React from 'react';
+
+export default function Home () {
+    return (
+        <div>
+            <h3>Sima Space - CRM Integration</h3>
+        </div>
+    );
+}

client/src/scenes/NotFound/index.js

@@ -0,0 +1,9 @@
+import React from 'react';
+
+export default function NotFound () {
+    return (
+        <div>
+            <h1>Page not found</h1>
+        </div>
+    );
+}