Adding 8000 port number to be same as picture

Author: peter279k

docs/framework/running-application.md

@@ -7,7 +7,7 @@
 PHP provides us a built-in web server which is cool for development purposes
 
 ````bash
-php -S 127.0.0.1 -t public
+php -S 127.0.0.1:8000 -t public
 ````
 ![running built in server](/../images/php-built-in-server.jpg)