feat(website): mirror prod hostname pattern on dev (apex + www) (#20753)

## Summary
Drops the `website.` subdomain on dev entirely and serves the marketing
site from the bare zone + `www`, mirroring how prod is served at
`twenty.com` + `www.twenty.com`.

Also fixes a latent root-path substitution bug in the existing www→apex
redirect that was masked on prod by a CF-level redirect.

## What changes
- `wrangler.jsonc` env.dev routes: `twenty-main.com` (apex) +
`www.twenty-main.com` (was `website.twenty-main.com`)
- `next.config.ts`: extends host-based www→apex redirect to also cover
`www.twenty-main.com`, and adds explicit `source: '/'` rules for both
prod + dev before the catch-all `source: '/:path*'` (the `:path*`
parameter doesn't substitute properly when it matches the empty root
path against an absolute destination URL — Next.js leaves the literal
`:path*` in the `Location` header)

## Live verification (after redeploy)
| URL | Status | Notes |
|---|---|---|
| `https://twenty-main.com/` | 200 | `x-opennext: 1`, `x-nextjs-cache:
HIT` |
| `https://twenty-main.com/pricing` | 200 | Worker SSR |
| `https://www.twenty-main.com/` | 308 → `https://twenty-main.com/` |
Root-redirect fix applied |
| `https://www.twenty-main.com/pricing` | 308 →
`https://twenty-main.com/pricing` | Path preserved |
| `https://twenty.com/` | 200 | Unchanged |
| `https://www.twenty.com/` | 301 → `https://twenty.com/` | Still routed
via CF-level redirect, now also covered by the new explicit Next rule as
a defense-in-depth |
| `https://website.twenty-main.com/` | 503 | DNS record removed by
wrangler when route was deleted; hostname effectively retired |

## Companion infra PR
https://github.com/twentyhq/twenty-infra/pull/__ —
`cloudflare/website/dev.env` + `docs/4-environments.md` updated to the
new URL; also bundles the CI fix that should have landed in #683 (was
pushed too late).

packages/twenty-website/next.config.ts

@@ -101,12 +101,33 @@ const nextConfig: LinariaConfig = {
   async redirects() {
     return [
       // Canonicalise www → apex. Host-based; fires before any locale logic.
+      // The root-path rule must come before the :path* one — Next.js's
+      // path-to-regexp leaves a literal `:path*` in the Location header
+      // when the parameter matches empty against an absolute destination.
+      {
+        source: '/',
+        has: [{ type: 'host', value: 'www.twenty.com' }],
+        destination: 'https://twenty.com/',
+        permanent: true,
+      },
       {
         source: '/:path*',
         has: [{ type: 'host', value: 'www.twenty.com' }],
         destination: 'https://twenty.com/:path*',
         permanent: true,
       },
+      {
+        source: '/',
+        has: [{ type: 'host', value: 'www.twenty-main.com' }],
+        destination: 'https://twenty-main.com/',
+        permanent: true,
+      },
+      {
+        source: '/:path*',
+        has: [{ type: 'host', value: 'www.twenty-main.com' }],
+        destination: 'https://twenty-main.com/:path*',
+        permanent: true,
+      },
       // Strip the source-locale prefix: /en/foo → /foo (301). Mirrors proxy.ts Rule 1.
       { source: '/en', destination: '/', statusCode: 301 },
       { source: '/en/:path*', destination: '/:path*', statusCode: 301 },

packages/twenty-website/wrangler.jsonc

@@ -16,7 +16,11 @@
       "name": "twenty-website-dev",
       "routes": [
         {
-          "pattern": "website.twenty-main.com",
+          "pattern": "twenty-main.com",
+          "custom_domain": true,
+        },
+        {
+          "pattern": "www.twenty-main.com",
           "custom_domain": true,
         },
       ],