website: move into monorepo

apps/website/src/theme/DocItem/Content/index.js

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+import React from 'react';
+import clsx from 'clsx';
+import { ThemeClassNames } from '@docusaurus/theme-common';
+import { useDoc } from '@docusaurus/theme-common/internal';
+import Heading from '@theme/Heading';
+import MDXContent from '@theme/MDXContent';
+/**
+ Title can be declared inside md content or declared through
+ front matter and added manually. To make both cases consistent,
+ the added title is added under the same div.markdown block
+ See https://github.com/facebook/docusaurus/pull/4882#issuecomment-853021120
+
+ We render a "synthetic title" if:
+ - user doesn't ask to hide it with front matter
+ - the markdown content does not already contain a top-level h1 heading
+*/
+function useSyntheticTitle() {
+  const { metadata, frontMatter, contentTitle } = useDoc();
+  const shouldRender =
+    !frontMatter.hide_title && typeof contentTitle === 'undefined';
+  if (!shouldRender) {
+    return null;
+  }
+  return metadata.title;
+}
+export default function DocItemContent({ children }) {
+  const syntheticTitle = useSyntheticTitle();
+  return (
+    <div className={clsx(ThemeClassNames.docs.docMarkdown, 'markdown')}>
+      {syntheticTitle && (
+        <header>
+          <Heading as="h1">{syntheticTitle}</Heading>
+        </header>
+      )}
+      <div className="margin-bottom--lg">
+        <iframe
+          src="https://ghbtns.com/github-btn.html?user=yangshun&amp;repo=tech-interview-handbook&amp;type=star&amp;count=true&amp;size=large"
+          frameBorder={0}
+          width={160}
+          height={30}
+          title="GitHub Stars"
+        />
+      </div>
+      <MDXContent>{children}</MDXContent>
+    </div>
+  );
+}

apps/website/src/theme/DocItem/Layout/index.js

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+import React from 'react';
+import clsx from 'clsx';
+import { useWindowSize } from '@docusaurus/theme-common';
+import { useDoc } from '@docusaurus/theme-common/internal';
+import DocItemPaginator from '@theme/DocItem/Paginator';
+import DocVersionBanner from '@theme/DocVersionBanner';
+import DocVersionBadge from '@theme/DocVersionBadge';
+import DocItemFooter from '@theme/DocItem/Footer';
+import DocItemTOCMobile from '@theme/DocItem/TOC/Mobile';
+import DocItemTOCDesktop from '@theme/DocItem/TOC/Desktop';
+import DocItemContent from '@theme/DocItem/Content';
+import DocBreadcrumbs from '@theme/DocBreadcrumbs';
+import styles from './styles.module.css';
+import SidebarAd from '../../../components/SidebarAd';
+
+/**
+ * Decide if the toc should be rendered, on mobile or desktop viewports
+ */
+function useDocTOC() {
+  const { frontMatter, toc } = useDoc();
+  const windowSize = useWindowSize();
+  const hidden = frontMatter.hide_table_of_contents;
+  const canRender = !hidden && toc.length > 0;
+  const mobile = canRender ? <DocItemTOCMobile /> : undefined;
+  const desktop =
+    canRender && (windowSize === 'desktop' || windowSize === 'ssr') ? (
+      <DocItemTOCDesktop />
+    ) : undefined;
+  return {
+    hidden,
+    mobile,
+    desktop,
+  };
+}
+export default function DocItemLayout({ children }) {
+  const docTOC = useDocTOC();
+  return (
+    <div className="row">
+      <div className={clsx('col', !docTOC.hidden && styles.docItemCol)}>
+        <DocVersionBanner />
+        <div className={styles.docItemContainer}>
+          <article>
+            <DocBreadcrumbs />
+            <DocVersionBadge />
+            {docTOC.mobile}
+            <DocItemContent>{children}</DocItemContent>
+            <DocItemFooter />
+          </article>
+          <DocItemPaginator />
+          {/* TIH: Add sidebar */}
+          <div className="margin-top--md">
+            <SidebarAd position="docs_bottom" />
+          </div>
+        </div>
+      </div>
+      {docTOC.desktop && <div className="col col--3">{docTOC.desktop}</div>}
+    </div>
+  );
+}

apps/website/src/theme/DocItem/Layout/styles.module.css

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+/* TIH: Add horizontal padding */
+@media (min-width: 768px) {
+  .docItemContainer {
+    padding: 0 3rem;
+  }
+}
+
+.docItemContainer header + *,
+.docItemContainer article > *:first-child {
+  margin-top: 0;
+}
+
+@media (min-width: 997px) {
+  .docItemCol {
+    max-width: 75% !important;
+  }
+}