Update with 8.4

config.yml

@@ -2,3 +2,45 @@
 # new-style config (as of 8.0) you can also declare values here in this file
 # to enforce defaults or to ensure they cannot be changed via the UI. For more
 # information see the Sentry documentation.
+
+###############
+# Mail Server #
+###############
+
+# mail.backend: 'smtp'  # Use dummy if you want to disable email entirely
+# mail.host: 'localhost'
+# mail.port: 25
+# mail.username: ''
+# mail.password: ''
+# mail.use-tls: false
+# The email address to send on behalf of
+# mail.from: 'root@localhost'
+
+# If you'd like to configure email replies, enable this.
+# mail.enable-replies: false
+
+# When email-replies are enabled, this value is used in the Reply-To header
+# mail.reply-hostname: ''
+
+# If you're using mailgun for inbound mail, set your API key and configure a
+# route to forward to /api/hooks/mailgun/inbound/
+# mail.mailgun-api-key: ''
+
+###################
+# System Settings #
+###################
+
+# If this file ever becomes compromised, it's important to regenerate your a new key
+# Changing this value will result in all current sessions being invalidated.
+# A new key can be generated with `$ sentry config generate-secret-key`
+# system.secret-key: 'changeme'
+
+# The ``redis.clusters`` setting is used, unsurprisingly, to configure Redis
+# clusters. These clusters can be then referred to by name when configuring
+# backends such as the cache, digests, or TSDB backend.
+# redis.clusters:
+#   default:
+#     hosts:
+#       0:
+#         host: 127.0.0.1
+#         port: 6379