MastodonKaigi.org is generated by React. Contents is written in JSX (XML-like syntax extension to ECMAScript).
Please check Code of Conduct.
$ git clone https://github.com/mastodonkaigi/mastodonkaigi.org.git
$ cd ./mastodonkaigi.org
$ yarn # install dependencies
$ yarn start # start dev server
$ yarn test
$ yarn lint
$ yarn build