Summary

• Add a reusable Vercel deployment script under scripts/deploy, adapted from corp-web-japan but parameterized with PROJECT_NAME so each micro-site project can have its own workflow.
• Add finance-specific deployment workflows:
  • Deploy Finance on Preview (.github/workflows/deploy-finance-on-preview.yml)
  • Deploy Finance on Staging (.github/workflows/deploy-finance-on-staging.yml)
  • Deploy Finance on Production (.github/workflows/deploy-finance-on-production.yml)
• Add apps/finance/vercel.json to mirror the sibling repo deployment model and disable automatic Vercel Git deployments because GitHub Actions owns deployment orchestration.
• Document the finance deployment model in README.md and extend the structure test to cover the deploy setup.

Verification

• npm run test:ci
• npm ci --prefix scripts/deploy
• node --check scripts/deploy/index.js
• python3 -m json.tool apps/finance/vercel.json >/dev/null

Notes

• Local next build printed a workspace-root warning because the worktree lives under another checkout with its own package-lock.json; the build still passed. A normal CI checkout should not have that nested-worktree layout.