If you haven't already, you need to follow all the previous steps of the Contributing section of the repo's Contribution Guidelines
$ cd kleros-v2/contracts
$ yarn build$ cd kleros-v2/web
$ yarn startIf you haven't already, you need to follow all the previous steps of the Contributing section of the repo's Contribution Guidelines
$ cd kleros-v2/contracts
$ yarn build$ cd kleros-v2/web
$ yarn start