notifications: server reboot email

src/mailer.js

@@ -11,6 +11,7 @@ exports = module.exports = {
     appDown,
     appUp,
     oomEvent,
+    rebootRequired,
 
     sendTestMail,
 
@@ -262,6 +263,21 @@ async function backupFailed(mailTo, errorMessage, logUrl) {
     await sendMail(mailOptions);
 }
 
+async function rebootRequired(mailTo) {
+    assert.strictEqual(typeof mailTo, 'string');
+
+    const mailConfig = await getMailConfig();
+
+    const mailOptions = {
+        from: mailConfig.notificationFrom,
+        to: mailTo,
+        subject: `[${mailConfig.cloudronName}] Reboot required for security updates`,
+        text: render('reboot_required-text.ejs', { webadminUrl: `https://${mailConfig.dashboardFqdn}`, notificationsUrl: mailConfig.notificationsUrl })
+    };
+
+    await sendMail(mailOptions);
+}
+
 async function certificateRenewalError(mailTo, domain, message) {
     assert.strictEqual(typeof mailTo, 'string');
     assert.strictEqual(typeof domain, 'string');