added port for bookstack-test

[richardhulbert]

Hi Dan

For those of us who might test using a mySQL db on a port other than 3306

Richard

[ssddanbrown]

Hi @richardhulbert,
Thank you for offering this pull request.

I'd prefer not to share any variables across testing and non-testing config, especially in this case where there's additional logic to parse out the port for backwards compatibility in production, to prevent confusion when actively testing. Therefore I'm going to close off this pull request without merging.

As of the current master branch, There is a TEST_DATABASE_URL env option available. You can set this in the format mysql://username:password@host:port/database which allows you use a custom port and even a custom database name. This will probably be the preferred approach to customising these testing options from now on.