docs(server): add nitro config and storage examples

docs/content/2.guide/3.directory-structure/13.server.md

@@ -7,3 +7,72 @@ head.title: Server directory
 # Server directory
 
 ::ReadMore{link="/guide/features/server-routes"}
+
+## nitro
+
+Create a new file in `nitro.config.ts`:
+
+```ts [nitro.config.ts]
+import { defineNitroConfig } from 'nitropack'
+
+export default defineNitroConfig({
+  storage: {
+    'redis': {
+      driver: 'redis',
+      /* redis connector options */
+      port: 6379, // Redis port
+      host: "127.0.0.1", // Redis host
+      username: "", // needs Redis >= 6
+      password: "",
+      db: 0, // Defaults to 0
+    },
+  }
+})
+```
+
+:LinkExample{link="https://nitro.unjs.io/guide/storage.html#defining-mountpoints"}
+
+## Example
+
+Create a new file in `server/api/test.post.ts`:
+
+```ts [/server/api/test.post.ts]
+export default async (req, res) => {
+  await useStorage().setItem('redis:nuxt3-redis', { hello: 'wallet' })
+  return 'Success'
+}
+```
+
+Create a new file in `server/api/test.get.ts`:
+
+```ts [/server/api/test.get.ts]
+export default async (req, res) => {
+  const data = await useStorage().getItem('redis:nuxt3-redis')
+  return data
+}
+```
+
+Create a new file in `app.vue`:
+
+```vue [app.vue]
+<script setup lang="ts">
+  const { data: resDataSuccess } = await useFetch(
+    '/api/test', 
+    {
+      method: 'post',
+      body: {
+        text: 'Welcome To Nuxt3'
+      }
+    }
+  )
+  const { data: resData } = await useFetch('/api/test')
+</script>
+
+<template>
+  <div>
+    <div>Post state: {{resDataSuccess}}</div>
+    <div>Get Data: {{ resData.text }}</div>
+  </div>
+</template>
+```
+