docs: storybook default landing page to introduction (#1056)

Author: jbadan

.storybook/main.js

@@ -1,7 +1,7 @@
 const path = require('path');
 
 module.exports = {
-    stories: ['../src/**/*.(stories|visual).(js|mdx)'],
+    stories: ['../src/Docs/introduction.stories.mdx', '../src/**/*.(stories|visual).js'],
 
     addons: [
         '@storybook/addon-knobs/register',

.storybook/preview.js

@@ -9,27 +9,8 @@ import { DocsContainer } from '@storybook/addon-docs/blocks';
 import DocsPage from './custom/components/DocsPage';
 import { addDecorator, addParameters } from '@storybook/react';
 
-// Order of folders to display
-const headers = [
-    'Introduction',
-    'Component API'
-];
-
-const storySort = (a, b) => {
-    const aHeader = a[1].kind.substr(0, a[1].kind.indexOf('/'));
-    const bHeader = b[1].kind.substr(0, b[1].kind.indexOf('/'));
-
-    if (aHeader !== bHeader) {
-        const aHeaderIndex = headers.findIndex(h => h === aHeader);
-        const bHeaderIndex = headers.findIndex(h => h === bHeader);
-        return aHeaderIndex - bHeaderIndex;
-    }
-    return 0;
-};
-
 addParameters({
     options: {
-        storySort,
         showRoots: true,
         theme: fundamentals
     },