How to install yii2?

Question

Yii

I use openserver, I put composer globally.
After installing the composer, I install fxp/composer-asset-plugin and then I create a yii2 project, and so, during installation, vendor is not loaded, all that is in the vendor folder is asset-plugin and autoload. Can you explain why vendor is not loading. I
install it like this:

cd modules/php/PHP-7-x64/
php -r "readfile('https://getcomposer.org/installer');" | php
echo @php "%~dp0composer.phar" %*>composer.bat
cd domains/localhost
composer global require "fxp/composer-asset-plugin"
composer create-project --prefer-dist yiisoft/yii2-app-basic ./

As far as I understand the problem is in composer.json, dependencies fly off