gram: docs

> ./vercel.json

{
  "$schema": "https://openapi.vercel.sh/vercel.json",
  "buildCommand": "bun run build",
  "outputDirectory": "examples/parity/dist",
  "installCommand": "rm -rf node_modules && bun install --frozen-lockfile",
  "redirects": [{ "source": "/", "destination": "/react/", "permanent": false }],
  "rewrites": [
    { "source": "/react/(.*)", "destination": "/react/index.html" },
    { "source": "/vue/(.*)", "destination": "/vue/index.html" }
  ]
}