docs: add typescript example for custom instance (#7288)

* docs: add abort controller example

* docs: add typescript example for custom instance

* Update server.js

* Delete examples/abort-controller/server.js

* Delete examples/abort-controller/index.html

---------

Co-authored-by: Jay <jasonsaayman@gmail.com>

README.md

@@ -1778,6 +1778,25 @@ If use ESM, your settings should be fine.
 If you compile TypeScript to CJS and you can’t use `"moduleResolution": "node 16"`, you have to enable `esModuleInterop`.
 If you use TypeScript to type check CJS JavaScript code, your only option is to use `"moduleResolution": "node16"`.
 
+
+You can also create a custom instance with typed interceptors:
+
+```typescript
+import axios, { AxiosInstance, InternalAxiosRequestConfig } from 'axios';
+
+const apiClient: AxiosInstance = axios.create({
+  baseURL: 'https://api.example.com',
+  timeout: 10000,
+});
+
+apiClient.interceptors.request.use(
+  (config: InternalAxiosRequestConfig) => {
+    // Add auth token
+    return config;
+  }
+);
+```
+
 ## Online one-click setup
 
 You can use Gitpod, an online IDE(which is free for Open Source) for contributing or running the examples online.