<img width="925" alt="スクリーンショット 2019-06-29 17 23 00" src="https://user-images.githubusercontent.com/16184855/60381625-9a87bb00-9a92-11e9-99af-952031ba2b8c.png"> https://github.com/GitbookIO/gitbook#%EF%B8%8F-deprecation-warning 移行先の選択肢: - https://github.com/rust-lang-nursery/mdBook - https://github.com/mkdocs/mkdocs/ - https://docusaurus.io/ mdBookが良さそう.
