Node email templates - Understanding file structure

I have messed around with my directories and paths so much that I just posted the original from github

  var path           = require('path')
     , templatesDir   = path.resolve(__dirname, '..', 'templates')
     , emailTemplates = require('../../')
     , nodemailer     = require('nodemailer');

If this is where I look for them. Can someone explain where I save my email templates? I am using the base express file structure so right inside my application file I have app.js, which holds this code. Thanks for anyone who knows. I am running out of things to try.