Alter url

Bookstack reads the environment variable "APP_URL", which unfortunately cannot be altered permanently in Container station.

So, while you've started with a wrong URL, you will end up trying to set it straight.

You can set it your environment variable manually with export APP_URL=xxxxx- but it will only work until the next startup of your docker.

Instead of redeploying a container or app, you can edit it manually.

1) To change the values in the database, use this command:

# Searches for  and replaces it with 
php artisan bookstack:update-url  

# Example:
php artisan bookstack:update-url http://docs.example.com https://demo.bookstackapp.com

2) to change the paths in the application, connect to the docker via terminal, and in the path, edit app.php
note: in the file it looks like the environment variable 'APP_URL' is being read. 

/app/www/app/Config#vi app.php