README: /edit entry point

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

README.md

@@ -154,7 +154,8 @@ Part of the ecommerce monorepo as the `cms-onpageeditor` submodule. Each instanc
   otherwise it does nothing.
 - `onpage-editor.js` - the editor.
 
-Entering/leaving edit mode: open any page with `?cms_preview=1` (sets the cookie, strips the param, reloads so the edge serves the
+Entering edit mode on a deployed site: open **`/edit`** or **`/edit/<path>`** (the edge, `deploy/nginx.conf`, sets the cookie and redirects
+to the page). Entering/leaving edit mode: open any page with `?cms_preview=1` (sets the cookie, strips the param, reloads so the edge serves the
 live render) and `?cms_preview=0` to leave. Dev: `make dev` rebuilds both into the instance's `public/` (`npm run build:watch`,
 `CMS_ONPAGE_OUT`). The shared `@k6n/cms-editor` sources are found at `../backoffice/web/packages/cms-editor/src` (submodule layout),
 `../ecommerce/...` (standalone checkout), `.cms-editor/` (Docker) or `CMS_EDITOR_SRC`.