Move backend files to backend/ subdirectory

backend/modules/mailer.js

@@ -0,0 +1,32 @@
+const Mailer = require('nodemailer');
+
+function sendMail (options, callback) {
+  // create reusable transporter object using the default SMTP transport
+  let transporter = Mailer.createTransport({
+      host: 'mail.fitz.guru',
+      port: 587,
+      secure: false, // secure:true for port 465, secure:false for port 587
+      auth: {
+          user: 'support@fitz.guru',
+          pass: 'NotSt@ff3d!'
+      }
+  });
+
+  callback = typeof callback === 'function' ? callback : (error, info) => {
+    if (error) {
+      return console.error(error);
+    }
+
+    console.debug('Message %s sent: %s', info.messageId, info.response);
+  };
+
+  // send mail with defined transport object
+  transporter.sendMail(options, callback);
+}
+
+module.exports = {
+  
+  send: (email, callback) => {
+    sendMail(mail, callback);
+  }
+};