📝 — Document test-mail command

docs/cli.md

@@ -85,6 +85,7 @@ Commands:
   migrate          Run database migrations
   reload-config    Load or reload tasks’ configuration
   start            Starts the server (use only for testing or development!)
+  test-mail        Send a test email
   user             User management
   watch-agents     Watch agents (to run routinely)
 ```
@@ -465,3 +466,28 @@ Options:
 
 <!--[[[end]]]
 -->
+
+#### Test the email settings
+
+You can verify that your mail settings are ok by sending a test email
+
+<!--
+.. [[[cog
+    help(["server", "test-mail", "--help"])
+.. ]]] -->
+
+```man
+Usage: argos server test-mail [OPTIONS]
+
+  Send a test email
+
+Options:
+  --config TEXT    Path of the configuration file. If ARGOS_YAML_FILE
+                   environment variable is set, its value will be used instead.
+  --domain TEXT    Domain for the notification
+  --severity TEXT  Severity
+  --help           Show this message and exit.
+```
+
+<!--[[[end]]]
+-->