Fix default values in environment file to address issues with certain commands

Author: DaneEveritt

.env.example

@@ -1,22 +1,18 @@
 APP_ENV=production
 APP_DEBUG=false
-APP_KEY=SomeRandomString3232RandomString
+APP_KEY=
 APP_THEME=pterodactyl
 APP_TIMEZONE=America/New_York
 APP_CLEAR_TASKLOG=720
 APP_DELETE_MINUTES=10
 APP_ENVIRONMENT_ONLY=true
-APP_URL=
 
 DB_HOST=127.0.0.1
 DB_PORT=3306
 DB_DATABASE=panel
 DB_USERNAME=pterodactyl
 DB_PASSWORD=
 
-CACHE_DRIVER=
-SESSION_DRIVER=
-
 HASHIDS_SALT=
 HASHIDS_LENGTH=8
 
@@ -28,9 +24,8 @@ MAIL_PASSWORD=
 MAIL_ENCRYPTION=tls
 MAIL_FROM=no-reply@example.com
 
-QUEUE_DRIVER=
 QUEUE_HIGH=high
 QUEUE_STANDARD=standard
 QUEUE_LOW=low
 
-APP_SERVICE_AUTHOR=undefined@unknown-author.com
+APP_SERVICE_AUTHOR=undefined@example.com