title: add new env file to laravel for new server environment
body: <p>i'm taking over a project from a client to add functionalities. I quite new in the development of Laravel 5.5</p>
  
  <p>There are already 3 .env files in my project:
  .env
  .env.example
  .env.live</p>
  
  <p>.env.live is for production (APP/ENV=production) and runs on aws, the other 2 are for local use.</p>
  
  <p>Now I have a new AWS EC2 server, database and so on and need a new env file to use these new instances. Let's say I create a new .env file called .env.dev</p>
  
  <p>How how can I switch between the .env.dev and .env.live? Or how do I use this .env.dev?</p>