I'm working on a website that communicates with a bank API. During the process, the API sends a request to a callback page. I, therefore, created a "callback_bank.php" file, and put it at the root of the drupal folder (along with index.php, cron.php, etc.) so it's accessible by http://www.mywebsite.com/callback_bank.php
How would I go about packaging/deploying that file with the custom module I created, that does the rest of the work ?