how_to_install_redis_in_lumen

1. Add in the "predis/predis": "~1.0" and "illuminate/redis": "5.4.*" packages to your lumen project
2. Add in the service provider of redis to config file of lumen
3. Add in the env variable of Redis to env file
4. Add in the Facade of Redis in your controller you'll going to use

NOTE:
1. Use Redis facade not Cache
2. You don't need to take care about the configuration, by the default, the database configuration will look for the laravel vendor package /vendor/laravel/lumen-framework/config/database.php