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What problem are you trying to solve with promisifying this file?

Not only this file. I would like to promisify tasks as extractDocs and generate, as would work better without depending on callbacks. What do you think?

It's unclear to me what the benefits would be, all the extractDocs methods are synchronous so adding asynchronocity in the mix would only make the code harder to work with.

As for the server itself, it's working fine as is.

It's tempting to go around a codebase and use the latest shiny abstraction but you should only do that to solve problems. If there aren't problems, adding abstraction is a net negative operation

Gotcha, you're right. Valid only commits to log repair :)