Summary:
Several blog and sharing improvements are included in this update.
* A larger default preview image is used when a blog post or doc is shared on social media as recommended by [best practices](https://developers.facebook.com/docs/sharing/best-practices#images).
* Follow other Facebook Sharing best practices such as associating the site with a Facebook Page (React) and a Page Admin (121800083 is my fbid, and I am an admin for the React page).
* If the shared blog post contains a hero image, use it as a share preview image.
* Use actual doc content instead of generic site description when sharing docs.
* Update existing hero images to use the larger recommended size.
* Add titles to each author's byline.
* Add author's avatar to their byline.
* Add Twitter Card support.
* Link to individual blog posts from the title and hero image in the blog index.
Old metadata tags (blog post):
```
<meta property="og:title" content="Toward Better Documentation – React Native | A framework for building native
Closes https://github.com/facebook/react-native/pull/9648
Differential Revision: D3790332
Pulled By: hramos
fbshipit-source-id: 4f284c6440482df8a42a2b8467ccf56b1fd725d1
Summary:
Updated the blog's styling to make it more readable.
* BlogPageLayout (blog index) - Only excerpts from each article are now shown, as opposed to the entire article.
* BlogPost - Broken up into headers, footers. Reorder header so that the blog post title is closer to the content. Adds support for hero images (visible from the blog index). Adds Facebook, Twitter social share buttons. List items are properly spaced now.
Blog index:
Single blog post:
Closes https://github.com/facebook/react-native/pull/9532
Differential Revision: D3758524
Pulled By: bestander
fbshipit-source-id: 6385a3e98a3a44343c3b1d3105a32023b748c2c6
Summary:
New blog up up for review. I've added a bit of padding between posts in the blog index as well.
Closes https://github.com/facebook/react-native/pull/9362
Differential Revision: D3717908
Pulled By: bestander
fbshipit-source-id: ac3c01c43685548c6fa336541ccb9a9a01dd52a8
Héctor Ramos
