Bug report: Can not start local development as described in README

[HiroyukiNaito]

Describe the bug

Can not start local development environment as described in README file.

To reproduce

1. $ yarn
2. $ yarn start
3. See error following

$ yarn start
yarn run v1.22.21
warning ../package.json: No license field
$ next start
- ready started server on 0.0.0.0:3000, url: http://localhost:3000
- warn You have enabled experimental feature (cpus) in next.config.js.
- warn Experimental features are not covered by semver, and may cause unexpected or broken application behavior. Use at your own risk.

Error: Could not find a production build in the '/home/hnaito/ethereum-org-website/.next' directory. Try building your app with 'next build' before starting the production server. https://nextjs.org/docs/messages/production-start-no-build-id
    at NextNodeServer.getBuildId (/home/hnaito/ethereum-org-website/node_modules/next/dist/server/next-server.js:349:23)
    at new Server (/home/hnaito/ethereum-org-website/node_modules/next/dist/server/base-server.js:152:29)
    at new NextNodeServer (/home/hnaito/ethereum-org-website/node_modules/next/dist/server/next-server.js:173:9)
    at NextServer.createServer (/home/hnaito/ethereum-org-website/node_modules/next/dist/server/next.js:179:24)
    at async /home/hnaito/ethereum-org-website/node_modules/next/dist/server/next.js:200:31
    at async NextServer.prepare (/home/hnaito/ethereum-org-website/node_modules/next/dist/server/next.js:161:24)
    at async Server.<anonymous> (/home/hnaito/ethereum-org-website/node_modules/next/dist/server/lib/render-server.js:128:17) {
  type: 'Error'
}
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

Expected behavior

1. $ yarn
2. $ yarn start
3. Access to localhost:8000 and start development

Screenshots

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Desktop (please complete the following information)

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Smartphone (please complete the following information)

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Additional context

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Would you like to work on this issue?

• Yes
• No