docs: improve gate docs

docs/_docs/components/gate.md

@@ -11,3 +11,9 @@ Gate provides API endpoints of Swingletree.
 * Provides metadata information to Swingletree plugins
 * Registers and manages plugin endpoints
 * Authenticates API calls (if auth token is configured)
+
+## Plugin routing
+
+Gate is the entrance for communicating with the running Swingletree plugins. Plugin endpoints are published under the path `/report/[plugin name]` (removing the `plugin-` prefix).
+
+Gate will check authentication (if configured) and initially prepare the request for consumption by the plugin.