Extract backend runtime configuration

backend/services/mailer.js

@@ -0,0 +1,20 @@
+const nodemailer = require('nodemailer');
+const { smtp } = require('../config/runtime');
+
+const transporter = nodemailer.createTransport({
+  host: smtp.host,
+  port: smtp.port,
+  secure: false,
+  auth: {
+    user: smtp.user,
+    pass: smtp.pass,
+  },
+  tls: {
+    ciphers: 'SSLv3',
+    rejectUnauthorized: false
+  },
+  debug: smtp.debug,
+  logger: smtp.debug
+});
+
+module.exports = transporter;