init

app/pages/NotFound/NotFound.tsx

@@ -0,0 +1,18 @@
+import React from 'react';
+import { RouteComponentProps } from 'react-router-dom';
+
+import './NotFound.scss';
+
+interface Props extends RouteComponentProps<any> {}
+
+interface State {}
+
+export default class NotFound extends React.Component<Props, State> {
+  constructor(props: Props) {
+    super(props);
+  }
+
+  render() {
+    return <div className="NotFound">404 Not Found</div>;
+  }
+}