Add ability to set multiple exception recipients

DEVELOPMENT.md

@@ -41,9 +41,12 @@ variables set as well:
 For the exception notification:
 
 * `ENABLE_EXCEPTION_NOTIFIER`
-* `EXCEPTION_NOTIFIER_RECIPIENT`
+* `EXCEPTION_NOTIFIER_RECIPIENTS` (optional, only if `ENABLE_EXCEPTION_NOTIFIER` is `true`)
 * `EXCEPTION_NOTIFIER_SENDER` (optional)
 
+If you want to add more than one recipient, you can pass in a string where the recipients
+are delimited by a semicolon `;`, e.g. `"foo@example.com; bar@example.com`
+
 For the devise mailer
 
 * `DEVISE_MAIL_SENDER` (optional)

config/initializers/exception_notification.rb

@@ -28,5 +28,5 @@
                                         email:             {
                                           email_prefix:         '[EXCEPTION NOTIFICATION] ',
                                           sender_address:       sender,
-                                          exception_recipients: Figaro.env.exception_notifier_recipient
+                                          exception_recipients: Figaro.env.exception_notifier_recipients.split(';').map(&:strip)
                                         }

docker-compose.yml

@@ -54,7 +54,7 @@ services:
       DISCORD_BOT_AUTH: ${DISCORD_BOT_AUTH:?err}
       # Exception notification
       ENABLE_EXCEPTION_NOTIFIER: ${ENABLE_EXCEPTION_NOTIFIER:-false}
-      EXCEPTION_NOTIFIER_RECIPIENT: ${EXCEPTION_NOTIFIER_RECIPIENT}
+      EXCEPTION_NOTIFIER_RECIPIENTS: ${EXCEPTION_NOTIFIER_RECIPIENTS}
       EXCEPTION_NOTIFIER_SENDER: ${EXCEPTION_NOTIFIER_SENDER}
       # Devise
       DEVISE_MAIL_SENDER: ${DEVISE_MAIL_SENDER}