Add concise feature list to readme

README.md

@@ -8,6 +8,14 @@ an application. For example, if an external database is intended to be used
 for some applicaiton, [k8s-linkup] can be used to make it available to the
 pods running in Kubernetes.
 
+## ✨ Features
+
+ * Orchestrate one or several VPN connections to remote sites
+ * Configure mappings of container ports to remote hosts/ports,
+   orchestrated as regular services inside Kubernetes
+ * Monitor availability of proxied services
+ * Support for [OpenVPN] and [WireGuard]
+
 ![Screenshot](./screenshot.webp)
 
 This utility is developed alongside the [AlekSIS®] project, to be able to