Adding the new rewrite

app/templates/emails/alert.html

@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+<head><meta charset="UTF-8"></head>
+<body style="font-family: -apple-system, Segoe UI, Arial, sans-serif; margin: 0; padding: 0; background: #f4f4f4;">
+<table role="presentation" width="100%" cellpadding="0" cellspacing="0" style="background: #f4f4f4; padding: 24px 0;">
+  <tr>
+    <td align="center">
+      <table role="presentation" width="560" cellpadding="0" cellspacing="0" style="background: #ffffff; border-radius: 6px; overflow: hidden; box-shadow: 0 2px 6px rgba(0,0,0,.08);">
+        <tr>
+          <td style="background: {{ color }}; color: #ffffff; padding: 16px 20px; font-size: 18px; font-weight: 600;">
+            [{{ top_severity }}] {{ ups_name }}
+          </td>
+        </tr>
+        <tr>
+          <td style="padding: 20px;">
+            <p style="margin: 0 0 12px; color: #333;">The following alerts were triggered:</p>
+            <ul style="margin: 0 0 16px; padding-left: 20px; color: #333;">
+              {% for a in alerts %}
+              <li style="margin-bottom: 6px;"><strong>[{{ a.severity }}]</strong> {{ a.message }}</li>
+              {% endfor %}
+            </ul>
+            <p style="margin: 0 0 8px;"><a href="{{ dashboard_url }}" style="color: #2980b9;">Open dashboard</a></p>
+            <p style="margin: 0; color: #888; font-size: 12px;">Sent at {{ sent_at }}</p>
+          </td>
+        </tr>
+      </table>
+    </td>
+  </tr>
+</table>
+</body>
+</html>