System- Requirement:
Apache 2.2 or 2.4 (or) nginx 1.x
MySQL 5.6, 5.7
PHP 7.1.x ( drop support for PHP 5.6)
How to Install Magento2.2:
1. Setup the system with above configuration
2. Enable necessary PHP library
3. Download Magento2.2 from Git Repo
4. Start install
5. Before start installation do composer install from root of the project