Update config/public/wp-config.php

Great and extremely useful project!

Here is a proposal to add some variables/settings to the wp-config - that i lost upon updating today, and that i know i'll be using on every project to allow running this wordpress install locally for development.

** Add variables to override the wordpress hostnames in the database.
**Add 'DB_PORT' to allow for nonstandard mysql ports for production and development.

(side note:  how do you use this project setup locally to develop?   i just copied in the whole wordpress install, but that seems not ideal.)