Documentation about preparation with optional performance components

README.md

 # Usage
 
+## Preparation
+
+- [Install composer](https://getcomposer.org): `sudo wget https://getcomposer.org/composer.phar --output-document=/usr/local/bin/composer && sudo chmod +x /usr/local/bin/composer`
+- Disable XDebug for CLI - optional: `sudo phpdismod -s cli xdebug`
+- [Install Prestissimo](https://github.com/hirak/prestissimo) - optional: `sudo composer global require "hirak/prestissimo:^0.3"`
+
 ## Create new project for local development
 
 ```