add monitoring

config/health/resources/MailgunConnectable.yml

@@ -0,0 +1,19 @@
+name: Mailgun Connectable
+abbreviation: redisconn
+checker: PragmaRX\Health\Checkers\PortCheck
+notify: true
+column_size: 3
+error_message: "Could not connect to %s on port %s"
+targets:
+  - mailgun1:
+      hostname: api.mailgun.net
+      port: 443
+      timeout: 2
+  - mailgun2:
+      hostname: smtp.mailgun.org
+      port: 465
+      timeout: 2
+  - mailgun3:
+      hostname: smtp.mailgun.org
+      port: 587
+      timeout: 2