fix(docs): port is not correct, Close #4607 (#4612)

docs/react/practical-projects.en-US.md

@@ -51,7 +51,7 @@ Note that the development build is not optimized.
 To create a production build, use npm run build.
 ```
 
-Open http://localhost:8989 in your browser, you will see dva welcome page.
+Open http://localhost:8000 in your browser, you will see dva welcome page.
 
 ## Integrate antd
 
@@ -97,7 +97,7 @@ Add routing information to router, edit `router.js`:
 + <Route path="/products" component={Products} />
 ```
 
-Then open http://localhost:8989/#/products in your browser, you should be able to see the `<h2>` tag defined before.
+Then open http://localhost:8000/#/products in your browser, you should be able to see the `<h2>` tag defined before.
 
 ## Write UI Components
 

docs/react/practical-projects.zh-CN.md

@@ -51,7 +51,7 @@ Note that the development build is not optimized.
 To create a production build, use npm run build.
 ```
 
-在浏览器里打开 http://localhost:8989 ，你会看到 dva 的欢迎界面。
+在浏览器里打开 http://localhost:8000 ，你会看到 dva 的欢迎界面。
 
 ## 使用 antd
 
@@ -97,7 +97,7 @@ export default Products;
 + <Route path="/products" component={Products} />
 ```
 
-然后在浏览器里打开 http://localhost:8989/#/products ，你应该能看到前面定义的 `<h2>` 标签。
+然后在浏览器里打开 http://localhost:8000/#/products ，你应该能看到前面定义的 `<h2>` 标签。
 
 ## 编写 UI Component