docs: document nitro hooks (#7782)

Co-authored-by: Daniel Roe <daniel@roe.dev>
Co-authored-by: Damian Głowala <48835293+DamianGlowala@users.noreply.github.com>

docs/content/2.guide/4.going-further/2.hooks.md

@@ -45,3 +45,26 @@ export default defineNuxtPlugin((nuxtApp) => {
 ::alert{icon=👉}
 Learn more about  [available lifecycle hooks](/api/advanced/hooks)
 ::
+
+## Nitro App Hooks (Runtime)
+
+These hooks are available for [Nitro plugins](https://nitro.unjs.io/guide/advanced/plugins) to hook into Nitro's runtime behavior.
+
+### Usage within a Nitro Plugin
+
+```js [~/server/plugins/test.ts]
+export default defineNitroPlugin((nitroApp) => {
+  nitroApp.hooks.hook('render:html', (html, { event }) => {
+    console.log('render:html', html)
+    html.bodyAppend.push('<hr>Appended by custom plugin')
+  })
+
+  nitroApp.hooks.hook('render:response', (response, { event }) => {
+    console.log('render:response', response)
+  })
+})
+```
+
+::alert{icon=👉}
+Learn more about available [Nitro lifecycle hooks](/api/advanced/hooks#nitro-hooks-runtime-server-side).
+::

docs/content/3.api/4.advanced/1.hooks.md

@@ -28,3 +28,10 @@ Hook                   | Arguments           | Environment     | Description
 Check the [schema source code](https://github.com/nuxt/framework/blob/main/packages/schema/src/types/hooks.ts#L55) for all available hooks.
 
 :NeedContribution
+
+# Nitro App Hooks (runtime, server-side)
+
+Hook                   | Arguments             | Description                          | Types
+-----------------------|-----------------------|--------------------------------------|------------------
+`render:response`      | `response, { event }` | Called before sending the response.  | [response](https://github.com/nuxt/framework/blob/71ef8bd3ff207fd51c2ca18d5a8c7140476780c7/packages/nuxt/src/core/runtime/nitro/renderer.ts#L24), [event](https://github.com/unjs/h3/blob/f6ceb5581043dc4d8b6eab91e9be4531e0c30f8e/src/types.ts#L38)
+`render:html`          | `html, { event }`     | Called before constructing the HTML. | [html](https://github.com/nuxt/framework/blob/71ef8bd3ff207fd51c2ca18d5a8c7140476780c7/packages/nuxt/src/core/runtime/nitro/renderer.ts#L15), [event](https://github.com/unjs/h3/blob/f6ceb5581043dc4d8b6eab91e9be4531e0c30f8e/src/types.ts#L38)