Revert "Update dependencies and rm website"

website/README.md

website/blog/2016-03-11-blog-post.md

website/blog/2017-04-10-blog-post-two.md

website/blog/2017-09-25-testing-rss.md

website/blog/2017-09-26-adding-rss.md

website/blog/2017-10-24-new-version-1.0.0.md

website/core/Footer.js

website/i18n/en.json

website/package.json

website/pages/en/help.js

website/pages/en/index.js

website/pages/en/users.js

website/sidebars.json

website/siteConfig.js

website/static/css/custom.css

website/static/img/docusaurus.svg

website/static/img/favicon.png

website/static/img/favicon/favicon.ico

website/static/img/oss_logo.png

website/yarn.lock