Website: Deliver contact form messages via email. (#29455)

Closes: https://github.com/fleetdm/confidential/issues/10750

Changes:
- Added a new config variable: `contactFormEmailAddress`
- updated deliver-contact-form-message to send emails to users who do
not have a Fleet Premium subscription.

website/api/controllers/deliver-contact-form-message.js

@@ -66,7 +66,7 @@ module.exports = {
         `Name: ${firstName + ' ' + lastName}, Email: ${emailAddress}, Message: ${message ? message : 'No message.'}`
       );
     }
-    if(userHasPremiumSubscription){
+    if(userHasPremiumSubscription) {
       // If the user has a Fleet Premium subscription, prepend the message with details about their subscription.
       let subscriptionDetails =`
 Fleet Premium subscription details:
@@ -94,6 +94,23 @@ Fleet Premium subscription details:
           message,
         },
       });
+    } else {
+      await sails.helpers.sendTemplateEmail.with({
+        to: sails.config.custom.contactFormEmailAddress,
+        replyTo: {
+          name: firstName + ' '+ lastName,
+          emailAddress: emailAddress,
+        },
+        subject: 'New contact form message',
+        layout: false,
+        template: 'email-contact-form',
+        templateData: {
+          emailAddress,
+          firstName,
+          lastName,
+          message,
+        },
+      });
     }
 
     await sails.helpers.http.post(sails.config.custom.slackWebhookUrlForContactForm, {