Created NotFound component

src/App.js

@@ -1,6 +1,7 @@
 import React from 'react';
 import { Route, Switch } from 'react-router-dom';
 import './App.scss';
+import NotFound from './common/NotFound';
 
 const App = (MainHeader, Home, MenuLayout, CreateServer) => () => (
   <div className="container-fluid app-container">
@@ -11,6 +12,7 @@ const App = (MainHeader, Home, MenuLayout, CreateServer) => () => (
         <Route exact path="/server/create" component={CreateServer} />
         <Route exact path="/" component={Home} />
         <Route path="/server/:serverId" component={MenuLayout} />
+        <Route component={NotFound} />
       </Switch>
     </div>
   </div>

src/common/NotFound.js

@@ -0,0 +1,15 @@
+import React from 'react';
+import { Link } from 'react-router-dom';
+
+const NotFound = () => (
+  <div className="home">
+    <h2>Oops! We could not find requested route.</h2>
+    <p>
+      Use your browser{'\''}s back button to navigate to the page you have previously come from, or just press this button.
+    </p>
+    <br />
+    <Link to="/" className="btn btn-outline-primary btn-lg">Home</Link>
+  </div>
+);
+
+export default NotFound;