Add error message to "Communication with SMS gateway failed"

Issue typpo#143

lib/config.js

@@ -5,7 +5,7 @@ const SENDMAIL_TRANSPORT = {
   path: '/usr/sbin/sendmail',
 };
 
-const EXAMPLE_SMTP_TRANSPORT = {
+const SMTP_TRANSPORT = {
   // This is a Nodemailer transport. It can either be an SMTP server or a
   // well-known service such as Sengrid, Mailgun, Gmail, etc.
   // See https://nodemailer.com/transports/ and https://nodemailer.com/smtp/well-known/
@@ -22,7 +22,7 @@ const EXAMPLE_SMTP_TRANSPORT = {
 };
 
 module.exports = {
-  transport: SENDMAIL_TRANSPORT,
+  transport: SMTP_TRANSPORT,
   mailOptions: {
     from: '"Jane Doe" <[email protected]>',
   },

server/app.js

@@ -57,7 +57,7 @@ function textRequestHandler(req, res, number, carrier, region) {
     if (err) {
       res.send({
         success: false,
-        message: 'Communication with SMS gateway failed.',
+        message: `Communication with SMS gateway failed. Did you configure mail transport in lib/config.js?  Error message: '${err.message}'`,
       });
     } else {
       res.send({ success: true });