Add gitlab ci workflow

Change-Id: Idb19ebd978a58010553ce4f817f02654102d1ed3
diff --git a/.gitignore b/.gitignore
index 60d006f..28ab00a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
 .*
 !/.gitignore
 !/.github
+!/.gitlab-ci.yml
 !/.mvn
 target
 tmp