First, you have to clone the grain-skeleton application:
$ git clone https://github.com/mylk/grain-skeleton.git path/to/install
Since the project is not yet in packagist.org as a package, you can't do something like this:
$ composer create-project mylk/grain-skeleton path/to/install
Assuming you already are in "path/to/install", its time to wipe the grain-skeleton history and start writing your own!
$ cd path/to/install
$ rm -rf .git
$ git init
The next step also assumes that you have Composer installed in a globally accessible directory:
$ composer install
You can now use Grain!
To see the skeleton application in action, start the PHP built-in web server:
$ php -S localhost:8080 -t web/ web/app_dev.php
Alternatively, if you have docker and docker-compose installed, you can run the application in a container:
$ docker-compose build
$ docker-compose up
Then, browse to http://localhost:8080/hello/yourname