Update README.md

Author: FabianKramm

README.md

@@ -1 +1,18 @@
-# devspace-cloud-plugin
+This plugin adds various [devspace-cloud](https://github.com/devspace-cloud/devspace-cloud) functionality to [devspace](https://github.com/devspace-cloud/devspace). 
+
+## Installation
+
+You add this plugin to devspace via:
+```
+devspace add plugin https://github.com/devspace-cloud/devspace-cloud-plugin
+```
+
+Update this plugin via:
+```
+devspace update plugin devspace-cloud
+```
+
+Delete the plugin via:
+```
+devspace remove plugin devspace-cloud
+```