In case you are looking only for a web app you can check out this open source starter - https://github.com/hasura/gatsby-gitbook-starter https://github.com/has

In case you are looking only for a web app you can check out this open source starter - https://github.com/hasura/gatsby-gitbook-starter https://github.com/hasura/gatsby-gitbook-starter (Made using Gatsby and MDX). You can write markdown with added benefits of React components and this Gatsby starter will render a GitBook theme documentation site. Self host using Docker or build the static bundle and deploy to Netlify :) Disclaimer: I maintain this starter.