Add example story

.storybook/Example/Example.js

@@ -0,0 +1,26 @@
+import React, { Component } from 'react';
+import PropTypes from 'prop-types';
+
+export default class Example extends Component {
+    static propTypes = {
+        inverted: PropTypes.bool
+    }
+
+    render() {
+        const { inverted } = this.props;
+
+        let divProps;
+
+        if (inverted) {
+            divProps = { style: { background: 'black', color: 'white' } };
+        }
+
+        return (
+            <div {...divProps}>
+                <h1>This is an example story.</h1>
+                <p>Navigate to <strong>.storybook/Example</strong> to see how to add a story to your component.</p>
+                <p>For more info, have a look at the <a target="_blank" href="https://storybook.js.org/basics/introduction/">docs</a> or at some <a target="_blank" href="https://storybook.js.org/examples/">examples</a>.</p>
+            </div>
+        );
+    }
+}

.storybook/Example/Example.story.js

@@ -0,0 +1,21 @@
+import React, { Component } from 'react';
+import PropTypes from 'prop-types';
+import Example from './';
+
+// Defaults to <name>.story.js
+export const name = 'Example component';
+
+export default story => {
+    const states = {
+        'Regular state': () => (
+            <Example />
+        ),
+        'Inverted state': () => (
+            <Example inverted />
+        ),
+    };
+
+    for (const [state, render] of Object.entries(states)) {
+        story.add(state, render);
+    }
+};

.storybook/Example/index.js

@@ -0,0 +1 @@
+export { default } from './Example.js';

.storybook/stories.js

@@ -2,9 +2,10 @@ import React from 'react';
 
 import { storiesOf } from '@storybook/react';
 
+const example = require('./Example/Example.story.js');
 const stories = require('./foundStories').default;
 
-for (const [storyName, storyExport] of stories) {
+for (const [storyName, storyExport] of [['Example', example], ...stories]) {
     const { name, default: story } = storyExport;
 
     story(storiesOf(name || storyName, module));