Fix merge full and lite version in dockerfile and CI tests

Docker run Kustvakt full version by default. Run with argument --lite to
activate the lite version.

Change-Id: Iccdc21fcfcd439aca078751a738d007f098c5027
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index b0ac593..02fa71c 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -23,7 +23,7 @@
     - apk update
     - apk add --no-cache git
   script:
-    - docker build -f Dockerfile -t korap/kustvakt:$VID -t korap/kustvakt:latest .
+    - docker build -f Dockerfile -t korap/kustvakt:$VID .
     - docker save korap/kustvakt:$VID | xz -T0 -M16G -9 > kustvakt.tar.xz
   artifacts:
     paths: