currently it is not possible, to load the data on conf file from mysql source, or any other, but you can do one thing, you can create a php/node form, that updates the conf file. That way it will work
Relevant Skills and Experience
i can guide you with the process, you will need file handling knowledge, to update the conf file and write to it, after each write, the nginx should be restarted.
Proposed Milestones
$30 USD - for completion