Summary:
The goal of this PR is to place greater emphasis on the blog as a destination.
The dark Hero from the landing page is now present in the blog as well, and the content is front and center.
The sidebar has been removed. It is not necessary to show a list of recent blog posts in the sidebar when the blog landing page shows the same number of posts along with short excerpts.
The prev/next links have swapped positions, and will now display "Older posts" and "Newer posts".
The excerpts have been stripped of formatting and they are now consistent across the blog landing page and the OpenGraph metatags. Fixes#10597.
A signup form for the new React Native newsletter has been added to the footer.
Newsletter signup form in footer:

Blog landing page:
, with some additional recommendations that can be ignored for now.
> Congratulations!
>
> [Valid Atom 1.0] This is a valid Atom 1.0 feed.
> Recommendations
>
> This feed is valid, but interoperability with the widest range of feed readers could be improved by implementing the following recommendations.
> line 2, col
Closes https://github.com/facebook/react-native/pull/10611
Differential Revision: D4097381
Pulled By: mkonicek
fbshipit-source-id: 8d2e18923358d1903b2715b00c48680b0c4dff68
Summary:This puts the images inside of the blog folder in the output so we can safely copy them over. And moves the images in /blog/img/ in the source control so it's easier to discover (instead of having to search many levels deep).
Should make the website work!
Closes https://github.com/facebook/react-native/pull/6659
Differential Revision: D3098308
Pulled By: vjeux
fb-gh-sync-id: 99477e27843dd6c88aa854028944f2f0b672db1f
fbshipit-source-id: 99477e27843dd6c88aa854028944f2f0b672db1f