title: configuring redis_host in laravel
body: <p>I have purchased this laravel script and this is the configuration of my .env file:</p>
  
  <pre><code>APP_NAME=Laravel
  APP_ENV=local
  APP_KEY=base64:p8u22GdWV3ltFAoVzHIUxqoEnlQBpliDzqt7f+pr+ME=
  APP_DEBUG=false
  APP_LOG_LEVEL=debug
  APP_URL=http://mydomain
  
  DB_CONNECTION=mysql
  DB_HOST=localhost
  DB_PORT=3306
  DB_DATABASE=u532092539_smily
  DB_USERNAME=u532092539_smily
  DB_PASSWORD=dbpassword
  
  BROADCAST_DRIVER=log
  CACHE_DRIVER=file
  SESSION_DRIVER=file
  QUEUE_DRIVER=sync
  
  REDIS_HOST=127.0.0.1
  REDIS_PASSWORD=null
  REDIS_PORT=6379
  
  MAIL_DRIVER=smtp
  MAIL_HOST=smtp.mailtrap.io
  MAIL_PORT=2525
  MAIL_USERNAME=null
  MAIL_PASSWORD=null
  MAIL_ENCRYPTION=null
  </code></pre>
  
  <p>What is redis_host here and what it does? Should I configure it or not? Please help.</p>