Include config for Heroku. [skip ci]

.env.heroku

@@ -1,56 +0,0 @@
-APP_ENV=production
-APP_DEBUG=false
-APP_FORCE_SSL=false
-APP_FORCE_ROOT=
-APP_KEY=SomeRandomStringOf32CharsExactly
-APP_LOG=errorlog
-APP_LOG_LEVEL=debug
-APP_URL=http://localhost
-
-DB_CONNECTION=sqlite
-DB_HOST=127.0.0.1
-DB_PORT=3306
-DB_USERNAME=homestead
-DB_PASSWORD=secret
-
-BROADCAST_DRIVER=log
-CACHE_DRIVER=file
-SESSION_DRIVER=file
-QUEUE_DRIVER=sync
-
-COOKIE_PATH="/"
-COOKIE_DOMAIN=
-COOKIE_SECURE=false
-
-REDIS_HOST=127.0.0.1
-REDIS_PASSWORD=null
-REDIS_PORT=6379
-
-MAIL_DRIVER=smtp
-MAIL_HOST=mailtrap.io
-MAIL_PORT=2525
-MAIL_FROM=changeme@example.com
-MAIL_USERNAME=null
-MAIL_PASSWORD=null
-MAIL_ENCRYPTION=null
-
-SEND_REGISTRATION_MAIL=true
-SEND_ERROR_MESSAGE=true
-SHOW_INCOMPLETE_TRANSLATIONS=false
-
-CACHE_PREFIX=firefly
-
-EXCHANGE_RATE_SERVICE=fixerio
-
-GOOGLE_MAPS_API_KEY=
-ANALYTICS_ID=
-SITE_OWNER=mail@example.com
-USE_ENCRYPTION=true
-
-PUSHER_KEY=
-PUSHER_SECRET=
-PUSHER_APP_ID=
-
-DEMO_USERNAME=
-DEMO_PASSWORD=
-