Ask contributors to submit patches ideally via Gerrit

Change-Id: I28466c73f748469193dd19f1238e4ecbbdc17321
diff --git a/Readme.md b/Readme.md
index b753a96..f8e95fd 100644
--- a/Readme.md
+++ b/Readme.md
@@ -137,6 +137,11 @@
   $ mvn java-formatter:format
 ```
 
+Your contributions should ideally be committed via our [Gerrit server](https://korap.ids-mannheim.de/gerrit/)
+to facilitate reviewing (see [Gerrit Code Review - A Quick Introduction](https://korap.ids-mannheim.de/gerrit/Documentation/intro-quick.html)
+if you are not familiar with Gerrit). However, we are also happy to accept comments and pull requests
+via GitHub.
+
 Please note that unless you explicitly state otherwise any
 contribution intentionally submitted for inclusion into Krill shall –
 as Krill itself – be under the [BSD-2 License](https://raw.githubusercontent.com/KorAP/Krill/master/LICENSE).