Update readme

* Update README.md

Author: voskvv

README.md

@@ -1,4 +1,8 @@
-# Gateway API service for Containerum Platform
+# Gateway 
+Gateway is an API service that provides routing for [Containerum](https://github.com/containerum/containerum) components.
+
+## Prerequisites
+* Kubernetes
 
 ## Installation
 
@@ -9,3 +13,9 @@
   helm repo update
   helm install containerum/api-gateway
 ```
+
+## Contributions
+Please submit all contributions concerning Gateway component to this repository.
+
+## License
+Gateway project is licensed under the terms of the Apache License Version 2.0. Please see LICENSE in this repository for more details.