based on: https://medium.com/front-end-hacking/getting-started-with-modern-front-end-development-with-vue-js-1cc7b120a0e3
Run php internal server:
$php -S localhost:8000 router.php
In browser open http://localhost:8000
PHP webserver needed to show sample of direct url to specific photo data: http://localhost:8000/1 - you can use number from 1 to 5000