Add Docker Hub reference

Change-Id: If729eaf6c4adc64e8b914a17e3b6afd5687d9b08
diff --git a/README.md b/README.md
index 702093d..2098ecc 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,10 @@
 
 ## Installation
 
+The easiest way to install Koral-Mapper for deployment is using [Docker](https://hub.docker.com/r/korap/koral-mapper).
+
+For development purposes or non-docker environments, use
+
 ```bash
 go get github.com/KorAP/Koral-Mapper
 ```