I have a .env file with all the ENV variables for the website.  I use foreman to start my rails server locally.  I also use a simple heroku plugin to push the .env file to the various hosted sites like staging and production.  I think we need a consolidated place where all the ENV variables are listed and instructions for setting up your dev env are driven from that.  It's going to get complicated and error prone quickly if we have these instructions scattered all over the place.  I'll bring this up in our daily standup today.